The invention provides an up-lock reliability test device capable of realizing lock ring horizontal position adjustment, belongs to the technical field of aviation equipment up-lock reliability test, and aims at solving the problems that the present aircraft up-lock test device has low integral rigidity and cannot realize manual adjustment of the lock ring horizontal position. The up-lock is a test piece and is installed on a supporting rack. A lock ring module, a crank module and a loading driving module are arranged below the up-lock and fixed on the surface of a vibration table through a support respectively. The lock ring module is used for simulating upward and downward movement of the lock ring under the real situation and can realize adjustment of the lock ring horizontal position. The loading driving module is used for driving the lock ring to upward and downward move and loading working load on the up-lock through the lock ring module. The crank module is arranged between the lock ring module and the loading driving module and used for transmitting the movement and the load of the loading driving module to the lock ring module. The up-lock reliability test device is used for reliability testing of the up-lock.