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The flight speed of warhead fragments is an important parameter to reflect its performance index. Aiming at the problems in warhead fragment velocity parameter test, such as high test environment requirement, small test area, equipment structure easy to be damaged by fragment mishit, and high cost, a non-contact warhead fragment photoelectric velocity measurement system is designed, which includes original reflection film, reflection photoelectric detection device, photoelectric conversion circuit, signal processing circuit and velocity measurement device. The structure of the system and the principle of velocity measurement are described. The obtained light signal is converted into an electrical signal through the reflective photoelectric detection device and photoelectric conversion circuit. The integrated signal processing circuit is used to filter and amplify the electrical signal. The speed measuring device composed of STM32 and other peripherals automatically processes the data output and displays the flight speed results of warhead fragments. The experimental results show that the system can reliably and stably complete the measurement task of warhead fragmentation velocity. Compared with the traditional speed measurement system, it has the advantages of not limited to the environment, large test area, easy maintenance, low cost, simple operation and so on.