The embedded device based on MCU has the problems of low software reuse and low efficiency of development and debugging.This article analyzes the application requirements of MCU embedded devices and proposes a layered architecture of a general software platform for embedded devices.It provides a detailed description of the design ideas of the hardware system and software platform,and provides feasible solutions for core system functions such as task scheduling,configuration management,data interaction,debugging and monitoring.This software platform is deployed based on the STM32 hardware system and applied to various embedded devices in power system,which can effectively improve the efficiency of device development and maintenance,and has good engineering application prospects.