At present, the small commercial unmanned aerial vehicle data link is in the stage of rapid development, the world′s major countries are carrying out this area of work, and many Western powers have achieved technical results. However, the level of relevant research in China is still relatively backward, and no comprehensive commercial data link system has been established. Therefore, it is of great significance to carry out research on data link of small commercial unmanned aerial vehicles. In this paper, STM32 single chip and SI4463 chip, designed a wireless realtime data transceiver system. It is a UHF band based on the work distance of 10km, the data transmission rate of 10 Kbps UAV narrowband data link system, the system has a high transmission rate, data transceiver stable and reliable advantages