On March 24, Tencent Technology (Shenzhen) Co., Ltd. applied for the patent of "replacement method and device for human face in video to be played". The abstract shows that the method includes: taking the key point of the first human face identified from the decoded frame data of the video to be played as the vertex, performing three-dimensional modeling to obtain a three-dimensional model, and making the coordinates of the vertices of the three-dimensional model coincide with the first face in the video to be played The coordinates of the key points of the face are kept synchronized; the second face is obtained; the second face is used as a texture and applied to the 3D model. The present disclosure provides a technology for replacing a human face in a video with another person's face, which can restore features such as orientation and expression of the human face in the video.