The utility model belongs to pile foundation engineering foundation pile detecting instrument examination field specifically is a be applicable to large-tonnage load cell counter-force calibrating installation, including standard dynamometer and the examination frame that constitutes by back timber, many stands and base, the stand is for fixing on the base not pivoted screw rod, said screw rod runs through the back timber, the nut that forms the screw rotation with the screw rod with said back timber formation revolute pair, the transducer section of up placing load cell, pressure steel sheet, segment iron plate and standard dynamometer is down in proper order followed to the base upper surface, the center of pressure steel sheet has with the spherical crown curved surface of the curved surface phase-match of segment iron plate sunkenly, standard dynamometer's the transducer section and the lower surface contact of back timber. The utility model discloses change that present large-tonnage load cell calibrating installation is heavy, not portable, difficulty is realized to the large-tonnage load, inefficiency, situation that the examination expense is high, the device has advantages such as convenient to use, detachable transfer, area are little, examination efficiency can effective improve.