Disclosed is a gas cylinder self-resetting-type hip-joint testing machine, comprising a frame constituted of a top plate (31), a base plate (2) and a strut (15). A support frame (14) is provided in the frame, and a drive shaft (60) is fixed in the support frame (14). A lower cam wheel (5), a turbine (17), a central cam wheel (57) and an upper cam wheel (56) are successively provided on the drive shaft (60). A bearing seat with an arcuate surface is provided above the support frame (14) and a base with a spherical surface (53) is provided on the bearing seat with an arcuate surface and fits with the arcuate surface. A solution tray (26) is provided on the base with a spherical surface (53), and an articulation head ball seat (52) embedded in the base with a spherical surface (53) is provided in the solution tray (26). A movable platform (29) is provided on the solution tray (26) and is fixed to a tray edge thereof. The movable platform (29) is connected via a steel cable traction device and a pneumatic drive mechanism to the three cam wheels (5, 57, 56), respectively. A hydraulic cylinder (37) is provided on the top plate (31) with a piston rod of the hydraulic cylinder (37) passing through the top plate (31). A temperature controller (42) controlling the temperature in the solution tray (26) is provided on the top plate (31) and a ball push pin (8) is provided on the base plate (2) with the top of the ball push pin on the drive shaft (60). The testing machine has a compact structure, is low in cost, is convenient to operate, and can accurately simulate the actual movement of a human hip-joint in the environment of a testing room.Linvention concerne une machine dessai de larticulation de la hanche de type à réinitialisation automatique à cylindre de gaz, comprenant un cadre constitué par une plaque supérieure (31), une plaque de base (2) et un montant (15). Un cadre support (14) est situé dans le cadre et un arbre dentraînement (60) est fixé dans le cadre support (14