In recent years, the BeiDou Navigation Satellite System (BDS) has been playing an increasingly important role in the driverless vehicles, unmanned air vehicles and internet of vehicles. However, with the increasingly complex electromagnetic environment, the normal use of the BDS has been seriously affected. Therefore, the research of anti-interference technology based on BDS becomes particularly significant. This article analyzes the demand of anti-interference technology and the mainstream anti-interference technology in the future traffic field, designs a miniaturized navigation module, studies the cascade interference suppression algorithm based on frequency-space time domain, and conducts simulation for typical interference scenes. The results show that the Beidou miniaturized navigation module designed in this article has a good inhibitory effect on narrowband interference.