There are many researches on face detection abroad, such as MIT and CMU. Tsinghua University, Institute of Computing and Automation of China Academy of Sciences, Nanjing University of Science and Technology, Beijing University of Technology and other units. Engaged in research related to face detection. Moreover, the MPEG7-7 standard organization has established a draft group of face recognition, and the face detection algorithm is also the collection content. With the development of face detection research, the number of papers published worldwide has also increased greatly. For example, there are a large number of papers on face detection in FG, IEEE ICIP\CVPR and other important international conferences every year, accounting for 1/3 of the papers on face research. This shows that the world attaches importance to face detection technology.