To improve the quality of the signal transmission and increase the bandwidth in the photoelectric tracking equipment, a kind of mixed transmission design of low-speed digital signals and high-speed digital video signals in use of optical fiber has been carried out. And in the system the high-speed parallel and serial transmission cells realizes the serial and de-serial of the digital video signals in use of the Agilent chip of HDMP-1032/1034, the optical fiber transmits the high-speed optical signals as the transmission media. The signal transmission bandwidth can be up to over 500MHz in use of optical fiber, otherwise the signal transmission quality and environment adaptability has been improved greatly.