The invention provides a video motion amplification method, and belongs to image processing methods. The problems that the noise is greatly increased by adding an amplification factor in the existing video motion amplification method based on linear Euler and that the video motion amplification method based on plural operational pyramids suffers motion distortion and the like are solved. The video motion amplification method comprises the steps of video image decomposition, video frame color space conversion, N-layer pyramid decomposition, time domain bandpass filter, second spatial frequency band group amplification, acquisition of a fourth spatial frequency band group, reconstruction of a brightness matrix, restoration of a video frame color space, and output of a video image and the like. By adoption of the video motion amplification method, the problems that the noise is greatly increased by adding an amplification factor in the existing video motion amplification method based on linear Euler and that the video motion amplification method based on plural operational pyramids suffers motion distortion and the like are solved, and the video motion amplification method is suitable for small space-time motion amplification.