Based on the development and application of UAV flight control computer technology, this paper designs a flight control computer hardware platform for small UAVs based on Zynq platform. The hardware platform adopts SOC processing architecture, realizes hard real-time processing of hardware peripherals through dual ARM hard cores and peripheral FPGA integrated on a single chip, which greatly reduces the software burden. This paper describes in detail The power supply design, air pressure altitude, airspeed design, interface design of the hardware platform. Various test results show that the UAV flight control hardware platform of this architecture has higher integration, smaller size, and strong expansion capability. Each design unit can achieve the expected goals and is suitable for harsh working environments. It has good versatility for fixed-wing aircraft.