Embedded software patching method and device

The invention provides an embedded software patching method and device. The method comprises the steps that whether a library function in an ROM storage area has a fault problem or not is detected; if yes, obtaining a fault library function with a fault problem and a fault function interface corresponding to the fault library function; obtaining a new target application code according to the fault library function; realizing a target library function in a Flash storage area according to the target application code; obtaining a target function interface corresponding to the target library function; and modifying the fault function interface in the RAM storage area according to the target function interface. It can be seen that the method and device can quickly achieve software patching, a third-party tool is not needed, the storage space is saved, the patching process is simple, and therefore the patching efficiency is improved. 本申请提供一种嵌入式软件打补丁方法及装置，该方法包括：检测ROM存储区域中的库函数是否存在故障问题；如果是，则获取存在故障问题的故障库函数以及故障库函数对应的故障函