In order to solve the problem of disconnection between the generation and radiation of baseband signal in the open-source project, the main programming process of using preset position and trajectory to spoof the Global Positioning System (GPS) receiver with software defined radio(SDR) was abstracted based on the analysis of navigation positioning and spoofing principles. And the dynamic-driving program for spoof signal with GPS civil code based on SDR, which is closely coupled with the interaction interface, baseband signal generation, data transmission and signal radiation, was designed so that the adjustment of the spoofing signal was “just like driving a car”. The spoofing, controlling, and even capturing the “low-slow-small” drones can be researched with this program in the near future.