Micro-motion is one of the most significant characteristics that can distinguish warhead from decoys. A simulation software is built based on VC++6.0 in the paper, which can be used to analyze the warhead's micro-Doppler feature and display three-dimensional, visual view of warhead with micro-motion. The software can acquire micro-motion information from warhead echoes by means of STFT,in the meanwhile, the 3D visual view is obtained by DirectX technique. The software can provide both theoretical and practical micro-Doppler feature curves of warhead which vary from different radar carrier frequencies, spinning frequencies, conning frequencies, precession angle, et al. The software works smoothly and responds quickly. The theoretical micro-Doppler curves are consistent with micro-Doppler curves of the echoes by time-frequency analysis method, and the 3D view scenes coincide with the micro-motion greatly in display.