diff --git a/dispatch.h b/dispatch.h
index ff75ea7..87102d6 100644
--- a/dispatch.h
+++ b/dispatch.h
@@ -4,6 +4,7 @@ void toggle_scratchpad(const Arg *arg);
 void focusdir(const Arg *arg);
 void toggleoverview(const Arg *arg);
 void set_proportion(const Arg *arg);
+void increase_proportion(const Arg *arg);
 void switch_proportion_preset(const Arg *arg);
 void zoom(const Arg *arg);
 void tagtoleft(const Arg *arg);
diff --git a/maomao.c b/maomao.c
index 90e414a..3bba5de 100644
--- a/maomao.c
+++ b/maomao.c
@@ -5746,6 +5746,16 @@ void set_proportion(const Arg *arg) {
   }
 }
 
+void increase_proportion(const Arg *arg) {
+  if (selmon->sel) {
+    unsigned int max_client_width =
+        selmon->w.width - 2 * scroller_structs - gappih;
+    selmon->sel->scroller_proportion = MIN(MAX(arg->f + selmon->sel->scroller_proportion,0.1),1.0);
+    selmon->sel->geom.width = max_client_width * arg->f;
+    arrange(selmon, false);
+  }
+}
+
 // 显示所有tag 或 跳转到聚焦窗口的tag
 void toggleoverview(const Arg *arg) {
 
diff --git a/parse_config.h b/parse_config.h
index f958721..0f49741 100644
--- a/parse_config.h
+++ b/parse_config.h
@@ -402,6 +402,9 @@ FuncType parse_func_name(char *func_name, Arg *arg, char *arg_value) {
   } else if (strcmp(func_name, "set_proportion") == 0) {
     func = set_proportion;
     (*arg).f = atof(arg_value);
+  } else if (strcmp(func_name, "increase_proportion") == 0) {
+    func = increase_proportion;
+    (*arg).f = atof(arg_value);
   } else if (strcmp(func_name, "switch_proportion_preset") == 0) {
     func = switch_proportion_preset;
   } else if (strcmp(func_name, "viewtoleft") == 0) {