The invention relates to a fixture for grinding of end faces of calipers. The fixture comprises a clamping rod, a sleeve and a fixture body. The clamping rod is arranged in the sleeve. The lower end of the clamping rod is provided with limiting sliding blocks. The upper end of the clamping rod is provided with a pressing plate. The sleeve is fixed to the fixture body through screws. Sliding grooves used for vertical sliding of the limiting sliding blocks are formed in the sleeve. The outer portion of the sleeve is further provided with a locking nut for fixing the clamping rod. The end face, located on the side face of the locking nut, of the fixture body is provided with a boss. The boss is provided with a locating plate connected with the boss through an adjusting bolt. The locating plate is provided with a locating protruding block. The fixture has the advantages that the grinding quality is high, consumed time is short, and the efficiency is high.