Aiming at the problem of poor recognition accuracy of low slow small target in laser defense, a method of low slow small target recognition in laser defense based on embedded computer is proposed. This research first analyzes the principle of laser radar target detection and recognition, completes the architecture design of laser defense system based on embedded computer, and then completes the recognition design of low slow small targets for laser defense through target local feature extraction method and target recognition detection method. Finally, simulation experiments are carried out to prove the application effect of the proposed method. The experimental results show that the recognition accuracy of the proposed method for low, small and slow targets is higher than 91. 5%, and the average feature extraction time is less than 11. 3 ms, which is better than the comparison method.