The utility model provides an air supporting simulator gesture platform locking device, relates to the experimental safety guarantee field of air supporting simulator, including position motion platform, remote control ware, two effect formula pneumatic cylinder, first barb formula bayonet socket, second barb formula buckle and gesture motion platform, remote control ware fixed mounting is at position motion platform's lateral wall, and two effect formula pneumatic cylinder fixed mounting are in position motion platform bottom, first barb formula bayonet fixed installs the lower extreme at two effect formula pneumatic cylinder, attitude motion platform and the apex angle department rotation that can wind position motion platform, second barb formula buckle fixed mounting is in the lower bottom surface of attitude motion platform, the utility model discloses elimination personnel locking by hand introduce external disturbance, through the action of remote mode operation pneumatic cylinder, lock air supporting simulator gesture platform at specific position, and the chronogenesis action provides safeguard for the air supporting simulator is carried out on next step, has increased the experimental mechanical environment adaptability of air supporting simulator gesture platform.