The invention provides a measuring counter block of a pressure end face of a turbine rotor. The measuring counter block of the pressure end face of the turbine rotor can solve the problems existing in the prior art, and is high in accuracy degree. The measuring counter block of the pressure end face of the turbine rotor comprises a through gauge block and a check gauge block, wherein bottom end faces of the sliced and combined through gauge block and the check gauge block are aligned and are attached to a step on the back face of a turbine head. The end faces of the head portions of the through gauge block and the check gauge block are planes. The turbine rotor is installed in a hollow cavity formed by the through gauge block and the check gauge block in a sleeved mode, wherein the through gauge block and the check gauge block are mutually spliced and combined. The measuring counter block of the pressure end face of the turbine rotor is characterized in that semi-annular grooves are respectively formed in the bottom end faces of the through gauge block and the check gauge block, a through groove is formed in a body of the through gauge block, one end of the through groove is located on the end face of the head portion of the through gauge block, and the other end of the through groove is communicated with a semi-annular groove in the bottom end faces of the through gauge block. The measuring counter block of the pressure end face of the turbine rotor further comprises a vernier scale which can extend into the through groove, and reading numbers are curved on the vernier scale.