Abstract: The fact that switch chip in the UAV is easily damaged by the ESD electromagnetic pulse severely affects the normal communication of UAV data link. To solve the problem, this paper presents an approach by building human body-metal ESD circuit model and proceeds with a simulation analysis. It is shown that the protection effect of the chosen TVS device is significant under the 15 kV level of ESD. A comparison test of immunity to ESD electromagnetic pulse was carried out for the transceiver circuit before and after the installation of TVS protection devices respectively. The test shows that when the protection devices was installed in the circuit, the protection capacity against ESD electromagnetic pulse was maximally enhanced 7.4 times that before the installation.