Aiming at the difficult problem of upgrading program for embedded terminal equipment,this paper designs a program of remote upgrade program based on stm32.The principle of Single-chip In-Application Programming (IAP) technology and the method of stm32 micro-control er FLASH programming are studied in this paper.Circuit switched data is used for remote data transmission and error reduction is designed for the transmitted data.Validation results show that the program is not only reliable and stable,but also reduces the maintenance costs of upgrading program for embedded terminal equipment.%针对嵌入式终端设备程序升级维护困难的问题，本文设计了一种基于stm32的程序远程升级方案。该方案主要研究了单片机在应用中编程（IAP）技术原理及stm32微控制器的FLASH编程，采用电路数据交换业务（CSD）进行远程无线传输数据，并且对传输数据进行了抗误码设计。验证结果表明了该方案不仅可靠稳定，而且降低了嵌入式终端设备程序的升级维护成本。
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