The invention discloses a switch quantity comparison method for a collection front end. According to the comparison method, the problem of integration of human face identification and gate control inthe front end is solved; human faces of different angles are efficiently and accurately located at the front end; a unified human face picture source is provided for identification; feature points areextracted at the front end and compared with a target portrait library; and the human certificate clearance efficiency is greatly improved in combination with the gate switch quantity control of thefront end. The method sequentially comprises the following steps of 1: turning on a camera for performing video previewing and collection in real time; 2: regularly extracting pictures of frames of the camera to obtain a human face picture; 3: executing a human face multi-angle detection algorithm, and judging whether a human face is an effective human face or not; if the human face exists, extracting and collecting feature points of a human face photo, performing identification calculation with the portrait library, and judging whether verification is passed or not; if it is judged that the human face does not exist or the verification is not passed, ending operation, and if the verification is passed, entering a next process; and 4: sending a switch quantity instruction for controlling aswitch quantity device.