The utility model discloses a multi -functional frame of resistant fatigue testing machine, include: the base, a pair of stand, its vertical setting on the base, correspond the entablature and the bottom end rail that set up in the middle of a pair of stand, it sets up on the up end of bottom end rail perpendicularly to prop up supporting bench, fatigue load output mechanism is through hoisting on the entablature, and rotatable reciprocating is held to fatigue load output mechanism's pressure, and the pressure of pressure end is used in on the supporting bench perpendicularly, and one -way movable hinged -support, it includes that two are kowtowed the branch support of establishing each other to and the back shaft of the embedded setting of detachable in the synthetic accommodation space of two first arc holding marges of kowtowing the branch support established each other, wherein, one -way movable hinged -support correspond to fill up respectively establish the test piece with supporting bench with conflict department of pressure end. A pedestal.