The utility model relates to an anchor clamps for thermal simulation compression sample end -face grinding, including locating piece no. 1, locating piece no. 2, screw rod, fastener, locating piece one side be equipped with semi -circular opening, two both sides of locating piece all are equipped with semi -circular opening, locating piece no. 1 and two both ends of locating piece all be equipped with with screw rod assorted through -hole, locating piece no. 1, locating piece no. 2 are fixed through screw rod and fastener, locating piece no. 1 and locating piece no. 2 match and form circular through -hole in semi -circular opening department. The utility model has the advantages that: through locating piece no. 1 and two cooperations of locating piece, the circular through -hole that utilizes the cooperation to form carries out the clamping to the sample, and that has realized the sample stabilizes the clamping grinding, has prevented that the sample from scrapping because of the grinding slope, uses these anchor clamps laborsaving, convenient, safe, reliably, can improve production efficiency, the assurance machining precision by a wide margin.