The utility model discloses a brake chip selection is to charging mechanism relates to the brake block technical field that feeds. This charging mechanism includes portion of feeding and clamping part, and wherein, the portion of feeding includes servo motor and the frock clamp who is connected with servo motor, the last arch that is equipped with of frock clamp, and the clamping part includes fixture and drive arrangement, drive arrangement and fixture are connected for control fixture follows frock clamp's axis direction reciprocating motion, and charging mechanism still includes position detecting device and controller, position detecting device the controller is connected for detect the brake block signal of packing into among the frock clamp of packing into, and will pack signal transmission into and give the controller, the controller is connected with the portion of feeding, clamping part.