diff --git a/src/plugin-qt/wallpapercache/CMakeLists.txt b/src/plugin-qt/wallpapercache/CMakeLists.txt
index 96c5b3c1..f966f5b9 100644
--- a/src/plugin-qt/wallpapercache/CMakeLists.txt
+++ b/src/plugin-qt/wallpapercache/CMakeLists.txt
@@ -65,3 +65,6 @@ install(FILES
     ${MISC_DIR}/deepin-service-plugin@org.deepin.dde.WallpaperCache.service.d/override.conf
     DESTINATION lib/systemd/system/deepin-service-plugin@org.deepin.dde.WallpaperCache.service.d/
 )
+# Pre-generate blur cache for default wallpaper at boot (avoid first-boot cold-start delay)
+install(PROGRAMS ${MISC_DIR}/wallpaper-cache-preheat.sh DESTINATION ${CMAKE_INSTALL_LIBDIR}/deepin-service-manager/)
+install(FILES ${MISC_DIR}/dde-wallpaper-cache-preheat.service DESTINATION lib/systemd/system/)
diff --git a/src/plugin-qt/wallpapercache/misc/dde-wallpaper-cache-preheat.service b/src/plugin-qt/wallpapercache/misc/dde-wallpaper-cache-preheat.service
new file mode 100644
index 00000000..8ade82c3
--- /dev/null
+++ b/src/plugin-qt/wallpapercache/misc/dde-wallpaper-cache-preheat.service
@@ -0,0 +1,16 @@
+[Unit]
+Description=Pre-generate wallpaper blur cache for default wallpaper
+Documentation=https://pms.uniontech.com/bug-view-335593.html
+After=dbus.service
+Before=display-manager.service
+ConditionPathExists=/usr/share/backgrounds/default_background.jpg
+ConditionPathExists=!/var/cache/dde-wallpaper-cache/blur
+
+[Service]
+Type=oneshot
+ExecStart=/usr/lib/deepin-service-manager/wallpaper-cache-preheat.sh
+TimeoutStartSec=60
+RemainAfterExit=no
+
+[Install]
+WantedBy=multi-user.target
diff --git a/src/plugin-qt/wallpapercache/misc/wallpaper-cache-preheat.sh b/src/plugin-qt/wallpapercache/misc/wallpaper-cache-preheat.sh
new file mode 100755
index 00000000..76d66f8e
--- /dev/null
+++ b/src/plugin-qt/wallpapercache/misc/wallpaper-cache-preheat.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+# Pre-generate blur cache for the default wallpaper to avoid D-Bus
+# on-demand activation cold-start delay on first boot.
+#
+# The wallpapercache plugin (org.deepin.dde.ImageEffect1) is loaded
+# on-demand by deepin-service-manager. On a freshly installed system
+# the blur cache directory is empty, so the first Get() call must
+# cold-start the service AND generate the blur image from scratch,
+# which can exceed the greeter client's timeout.
+#
+# This script triggers the service early in boot (before the display
+# manager) so that the blur file is cached on disk by the time the
+# greeter requests it. Failures are non-fatal — the greeter will
+# still fall back to the original wallpaper.
+
+DEFAULT_WALLPAPER="/usr/share/backgrounds/default_background.jpg"
+
+[ -f "$DEFAULT_WALLPAPER" ] || exit 0
+
+# Trigger D-Bus activation of the wallpapercache plugin and request
+# blur generation for the default wallpaper. Use a generous timeout
+# (30 s) to accommodate cold-start + image processing on slow hardware.
+dbus-send --system --print-reply --reply-timeout=30000 \
+    --dest=org.deepin.dde.ImageEffect1 \
+    /org/deepin/dde/ImageEffect1 \
+    org.deepin.dde.ImageEffect1.Get \
+    string:"" string:"$DEFAULT_WALLPAPER" >/dev/null 2>&1 || true
+
+exit 0