The invention relates to a full automatic balance rider type power calibrator, aiming at overcoming the problem of low efficiency, narrow power value range, bad service performance, large deficiency in the applicable degree of ergometer testing rules, and the like. The full automatic balance rider type power calibrator comprises a host, a lever beam and a controlling system. An incision bearing type is adopted between the lever beam and the fulcrum of the host; the incision bearing of the fulcrum comprises a fulcrum knife and a fulcrum bearing, and the knife edge of the fulcrum knife with a small radius is contacted and connected with the groove of the fulcrum bearing with a small radius. The incision bearing type is also adopted between the lever beam and the force application point of the host; the incision bearing at the force application point comprises a force point knife and a force point bearing, and the knife edge of the force point knife with a small radius is contacted and connected with the groove of the force point bearing with a small radius. A damper is fixedly arranged on a mounting plate which is arranged under the right end of the lever beam, which consists of a liquid damper and a semi-active friction damper. The controlling system is provided with a computer which is provided with a computer program and runs the computer program for a visualized monitoring of the working process.