Three-coordinate standardized positioning platform deck

The utility model discloses a three-coordinate standardized positioning platform deck, which comprises a platform deck fixed on a working table of a three-coordinate measuring instrument, no less than two eccentric positioning pins, a diagonal clamping frame, a clamping stud and locking bolts, a plurality of threaded holes are uniformly formed in the upper end face of the platform deck in an array manner, four corners of the platform deck are fixed by matching with pressing blocks through the locking bolts, and the upper end face of the platform deck is fixed with the clamping stud. The eccentric positioning pin comprises a positioning column, an eccentric block and a pin column which are integrally arranged, the positioning column is matched with a mounting hole shaft hole of a non-standard product to be detected, an elastic clamping jaw is arranged at the front end of the diagonal clamping frame, and through holes matched with a clamping stud shaft hole are formed in the middle and the tail of the diagonal