diff --git a/jodconverter-web/src/main/conf/application.properties b/jodconverter-web/src/main/conf/application.properties
index b7ed94e6..e850aeb0 100644
--- a/jodconverter-web/src/main/conf/application.properties
+++ b/jodconverter-web/src/main/conf/application.properties
@@ -31,6 +31,9 @@ spring.http.multipart.max-file-size=100MB
 cache.clean = true
 
 #######################################可在运行时动态配置#######################################
+#提供预览服务的地址，默认从请求url读，如果使用nginx等反向代理，需要手动设置
+#base.url = https://file.keking.cn
+
 #是否启用缓存
 cache.enabled = true
 
diff --git a/jodconverter-web/src/main/java/cn/keking/config/ConfigConstants.java b/jodconverter-web/src/main/java/cn/keking/config/ConfigConstants.java
index 488189de..c292fb10 100644
--- a/jodconverter-web/src/main/java/cn/keking/config/ConfigConstants.java
+++ b/jodconverter-web/src/main/java/cn/keking/config/ConfigConstants.java
@@ -23,6 +23,7 @@ public class ConfigConstants {
     private static String ftpPassword;
     private static String ftpControlEncoding;
     private static String fileDir = OfficeUtils.getHomePath() + File.separator + "file" + File.separator;
+    private static String baseUrl;
 
     public static Boolean isCacheEnabled() {
         return cacheEnabled;
@@ -92,6 +93,15 @@ public class ConfigConstants {
         return fileDir;
     }
 
+    public static String getBaseUrl() {
+        return baseUrl;
+    }
+
+    public static void setBaseUrl(String baseUrl) {
+        // 不以'/'结尾的，加上'/'
+        ConfigConstants.baseUrl = baseUrl.concat("/");
+    }
+
     @Value("${file.dir:default}")
     public void setFileDir(String fileDir) {
         if (!"default".equals(fileDir)) {
diff --git a/jodconverter-web/src/main/java/cn/keking/config/ConfigRefreshComponent.java b/jodconverter-web/src/main/java/cn/keking/config/ConfigRefreshComponent.java
index 563a8cd9..163323a0 100644
--- a/jodconverter-web/src/main/java/cn/keking/config/ConfigRefreshComponent.java
+++ b/jodconverter-web/src/main/java/cn/keking/config/ConfigRefreshComponent.java
@@ -5,6 +5,7 @@ import org.artofsolving.jodconverter.office.OfficeUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Component;
+import org.springframework.util.StringUtils;
 
 import javax.annotation.PostConstruct;
 import java.io.BufferedReader;
@@ -29,6 +30,7 @@ public class ConfigRefreshComponent {
     public static final String DEFAULT_FTP_USERNAME = null;
     public static final String DEFAULT_FTP_PASSWORD = null;
     public static final String DEFAULT_FTP_CONTROL_ENCODING = "UTF-8";
+    public static final String BASE_URL = null;
 
 
     @PostConstruct
@@ -53,6 +55,7 @@ public class ConfigRefreshComponent {
                 String ftpPassword;
                 String ftpControlEncoding;
                 String configFilePath = OfficeUtils.getCustomizedConfigPath();
+                String baseUlr;
                 while (true) {
                     FileReader fileReader = new FileReader(configFilePath);
                     BufferedReader bufferedReader = new BufferedReader(fileReader);
@@ -67,6 +70,7 @@ public class ConfigRefreshComponent {
                     ftpControlEncoding = properties.getProperty("ftp.control.encoding", DEFAULT_FTP_CONTROL_ENCODING);
                     textArray = text.split(",");
                     mediaArray = media.split(",");
+                    baseUlr = properties.getProperty("base.url", null);
                     ConfigConstants.setCacheEnabled(cacheEnabled);
                     ConfigConstants.setSimText(textArray);
                     ConfigConstants.setMedia(mediaArray);
@@ -75,6 +79,9 @@ public class ConfigRefreshComponent {
                     ConfigConstants.setFtpUsername(ftpUsername);
                     ConfigConstants.setFtpPassword(ftpPassword);
                     ConfigConstants.setFtpControlEncoding(ftpControlEncoding);
+                    if (baseUlr != null && !StringUtils.isEmpty(baseUlr)) {
+                        ConfigConstants.setBaseUrl(baseUlr);
+                    }
                     bufferedReader.close();
                     fileReader.close();
                     Thread.sleep(1000L);
diff --git a/jodconverter-web/src/main/java/cn/keking/filters/ChinesePathFilter.java b/jodconverter-web/src/main/java/cn/keking/filters/ChinesePathFilter.java
index cb241a36..695cab70 100644
--- a/jodconverter-web/src/main/java/cn/keking/filters/ChinesePathFilter.java
+++ b/jodconverter-web/src/main/java/cn/keking/filters/ChinesePathFilter.java
@@ -1,5 +1,8 @@
 package cn.keking.filters;
 
+import cn.keking.config.ConfigConstants;
+import org.springframework.util.StringUtils;
+
 import javax.servlet.*;
 import javax.servlet.http.HttpServletRequest;
 import java.io.IOException;
@@ -19,10 +22,16 @@ public class ChinesePathFilter implements Filter {
     public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
         request.setCharacterEncoding("UTF-8");
         response.setCharacterEncoding("UTF-8");
-        StringBuilder pathBuilder = new StringBuilder();
-        pathBuilder.append(request.getScheme()).append("://").append(request.getServerName()).append(":")
-                .append(request.getServerPort()).append(((HttpServletRequest)request).getContextPath()).append("/");
-        request.setAttribute("baseUrl", pathBuilder.toString());
+        String baseUrl;
+        if (ConfigConstants.getBaseUrl() != null) {
+            baseUrl = ConfigConstants.getBaseUrl();
+        } else {
+            StringBuilder pathBuilder = new StringBuilder();
+            pathBuilder.append(request.getScheme()).append("://").append(request.getServerName()).append(":")
+                    .append(request.getServerPort()).append(((HttpServletRequest) request).getContextPath()).append("/");
+            baseUrl = pathBuilder.toString();
+        }
+        request.setAttribute("baseUrl", baseUrl);
         chain.doFilter(request, response);
     }