Grinding equipment comprises a supporting device, a grinding and polishing device and a positioning clamping device; the supporting device comprises a feeding frame, a working table and a discharging frame which are connected in sequence; the grinding and polishing device comprises a telescopic air cylinder, a sliding table, a polishing wheel, a support and a motor; the telescopic air cylinder is installed on the working table, the sliding table is slidably installed on the working table, and the telescopic end of the telescopic air cylinder is connected with the sliding table; the support is installed on the sliding table, the polishing wheel is rotatably installed on the support, and the motor is installed on the support and is connected with the polishing wheel; the positioning clamping device comprises an installation plate, a clamping plate, a plurality of guiding rods and a plurality of adjusting nuts; and the installation plate is installed on the working table, and all guiding rods are installed on the installation plate in a spaced mode and slidably installed in the clamping plate in a penetrating mode. Through the grinding equipment, aluminum pieces can be better subjected to clamping positioning so that shake of the aluminum pieces generated during grinding and polishing is reduced.