In order to measure high-speed targets，a direct detecting lidar based on microwave photonics method，called microwave lidar，is designed.The basic principle is to use the phase modulator to load the radio frequency (microwave) signal onto the outgoing laser of the lidar，then the Fabry-Perot interferometer and the photodetector work together to demodulate the radio frequency signal from the target echo signal received by the lidar，and thus the target information is obtained by measuring the radio frequency signal.The microwave lidar retains the characteristics of high spatial resolution of the lidar，and also exerts the advantages of high-speed measurement range and anti-atmospheric turbulence of the microwave radar，thereby providing a new approach for the detection of high-speed targets.The software radio technology is used to generate，receive and process radio frequency (microwave) signals，and the speed measurement of rotating hard targets and aerosol simulated targets (such as high-speed missiles and their shock fields) is made.The experimental results proves that the lidar can measure high-speed targets (within Mach 4.4) and their shock fields.