diff --git a/src/config/parse_config.h b/src/config/parse_config.h
index 29fbb1e..84914a5 100644
--- a/src/config/parse_config.h
+++ b/src/config/parse_config.h
@@ -197,6 +197,7 @@ typedef struct {
 	float default_smfact;
 	unsigned int default_nmaster;
 	int center_master_overspread;
+	int center_when_single_slave;
 
 	unsigned int hotarea_size;
 	unsigned int enable_hotarea;
@@ -1201,6 +1202,8 @@ void parse_config_line(Config *config, const char *line) {
 		config->default_nmaster = atoi(value);
 	} else if (strcmp(key, "center_master_overspread") == 0) {
 		config->center_master_overspread = atoi(value);
+	} else if (strcmp(key, "center_when_single_slave") == 0) {
+		config->center_when_single_slave = atoi(value);
 	} else if (strcmp(key, "hotarea_size") == 0) {
 		config->hotarea_size = atoi(value);
 	} else if (strcmp(key, "enable_hotarea") == 0) {
@@ -2354,6 +2357,7 @@ void override_config(void) {
 	default_smfact = CLAMP_FLOAT(config.default_smfact, 0.1f, 0.9f);
 	default_nmaster = CLAMP_INT(config.default_nmaster, 1, 1000);
 	center_master_overspread = CLAMP_INT(config.center_master_overspread, 0, 1);
+	center_when_single_slave = CLAMP_INT(config.center_when_single_slave, 0, 1);
 	new_is_master = CLAMP_INT(config.new_is_master, 0, 1);
 
 	// 概述模式设置
@@ -2503,6 +2507,8 @@ void set_value_default() {
 	config.default_nmaster = default_nmaster; // 默认master数量
 	config.center_master_overspread =
 		center_master_overspread; // 中心master时是否铺满
+	config.center_when_single_slave =
+		center_when_single_slave; // 单个slave时是否居中
 
 	config.numlockon = numlockon; // 是否打开右边小键盘
 
diff --git a/src/config/preset.h b/src/config/preset.h
index 609d6aa..57ed80d 100644
--- a/src/config/preset.h
+++ b/src/config/preset.h
@@ -38,6 +38,7 @@ double default_mfact = 0.55f;				// master 窗口比例
 double default_smfact = 0.5f;				// 第一个stack窗口比例
 unsigned int default_nmaster = 1;			// 默认master数量
 int center_master_overspread = 0;			// 中心master时是否铺满
+int center_when_single_slave = 1;			// 单个slave时是否居中
 /* logging */
 int log_level = WLR_ERROR;
 unsigned int numlockon = 1; // 是否打开右边小键盘
diff --git a/src/layout/horizontal.h b/src/layout/horizontal.h
index 941f034..f23f09d 100644
--- a/src/layout/horizontal.h
+++ b/src/layout/horizontal.h
@@ -472,9 +472,16 @@ void center_tile(Monitor *m) {
 			tw = (m->w.width - mw - 2 * gappoh - gappih) / 2;
 			mx = gappoh + tw + gappih;
 		} else if (n - nmasters == 1) {
-			// 单个堆叠窗口：主区域居中，堆叠窗口在左，右边空着
-			tw = (m->w.width - mw - 2 * gappoh - gappih) / 2;
-			mx = gappoh + tw + gappih;
+			// 单个堆叠窗口的处理
+			if (center_when_single_slave) {
+				// 启用选项：主区域居中，堆叠窗口在左，右边空着
+				tw = (m->w.width - mw - 2 * gappoh - gappih) / 2;
+				mx = gappoh + tw + gappih;
+			} else {
+				// 修改：slave在右边，master在左边
+				tw = m->w.width - mw - 2 * gappoh - gappih;
+				mx = gappoh; // master在左边
+			}
 		} else {
 			// 只有主区域窗口：居中显示
 			tw = (m->w.width - mw - 2 * gappoh - gappih) / 2;
@@ -512,11 +519,19 @@ void center_tile(Monitor *m) {
 			unsigned int stack_index = i - nmasters;
 
 			if (n - nmasters == 1) {
-				// 单个堆叠窗口：放在左侧
+				// 单个堆叠窗口
 				unsigned int r = n - i;
 				h = (m->w.height - ety - gappov - gappiv * (r - 1)) / r;
 
-				int stack_x = m->w.x + gappoh; // 左侧位置
+				int stack_x;
+				if (center_when_single_slave) {
+					// 启用选项：放在左侧
+					stack_x = m->w.x + gappoh;
+				} else {
+					// 修改：放在右侧
+					stack_x = m->w.x + mx + mw + gappih;
+				}
+
 				resize(c,
 					   (struct wlr_box){.x = stack_x,
 										.y = m->w.y + ety,
@@ -528,8 +543,8 @@ void center_tile(Monitor *m) {
 				// 多个堆叠窗口：交替放在左右两侧
 				unsigned int r = (n - i + 1) / 2;
 
-				// 当n为奇数时翻转判断逻辑
-				if ((stack_index % 2) ^ (n % 2 != 0)) {
+				// 当n为偶数时翻转判断逻辑
+				if ((stack_index % 2) ^ (n % 2 == 0)) {
 					// 右侧堆叠窗口
 					h = (m->w.height - ety - gappov - gappiv * (r - 1)) / r;
 					int stack_x = m->w.x + mx + mw + gappih;