The invention discloses a multi-template face automatic input method in a face recognition system based on a video. The method comprises the following steps: firstly, obtaining a maximum face track ina video scene, automatically storing face pictures at multiple angles as templates according to a certain screening logic, and excluding pictures with too small faces, dynamic blurring and large angles during screening, thereby ensuring the quality of face templates; secondly, conducting illumination compensation on the template which is overexposed or insufficiently exposed, adding the compensated picture into the template of the person, and improving the comparison accuracy; and finally, converting the stored template extraction features into a face feature file, storing the face feature file into a face comparison database, and directly comparing the features, thereby reducing the operation time consumption. According to the input method, automatic collection of the user face is achieved, the input time is short, the user matching degree is low, meanwhile, the input template quality is high, and the recognition accuracy can be effectively improved.