In the shore-air bistatic HF/VHF radar system,the sending and receiving station have high requirements on the synchronization accuracy of time, frequency and phase, and it is difficult to realize, and the receiving station has high requirements on the size and weight of the synchro controller.In this paper，the synchro controller of shore-air bistatic HF/VHF radar system is designed based on digital signal processing, programmable logic gate array and GPS (DSP + FPGA + GPS).The UTC information and PPS signal in GPS signal is used to ensure the time synchronization of the two stations, and the independent high stable oscillator is calibrated by FPGA combined with PPS signal to ensure the frequency and phase synchronization of the two stations. The hardware structure is simplified to facilitate the integration of the whole receiving system, and the synchronization control parameters can be flexibly selected, and the startup time is flexible and controllable.In sending and receiving two stations set up the same synchro controller performance testing, the results show that the synchro controller realizes the synchronization of time, frequency and phase of the two stations, and the timing control signals generated are accurate, the synchronization accuracy of two stations is under 5ns, the coherence of bistatic radar system can be guaranteed in timing , and small in size, light in weight, easy to use, which fully meets the requirements of air-shore bibase HF/VHF radar system.