Abstract: This paper introduces a program of microwave Doppler radar for Vessel Velocity Measurement . The program uses a continuous wave emission, zero-IF receiver, making front-end circuits easy and signal processing simple.Moverover，the program uses IQ orthogonal two-channel receiver to obtain the velocity and direction， and track the antenna angle caused by wave using acceleration measurement chip ，leading to calculate the real-time speed of vessel moving real-time speed accurately.