Auxiliary locking device for tunnel trolley and working method of auxiliary locking device

The invention discloses an auxiliary locking device for a tunnel trolley and a working method of the auxiliary locking device. The auxiliary locking device comprises a mounting frame which is arranged outside trolley wheels in a sleeving mode and connected with wheel bearings. The locking assembly is arranged outside the trolley wheels and is connected with the mounting frame; the locking assembly comprises a locking piece which is locked with or unlocked from the track during working; and the control part is used for controlling the locking piece to move. When the trolley is parked, the telescopic pile drives the connecting plate to jack, and the connecting plate drives the opposite-penetrating steel bars to move and drives the locking piece to make contact with the upper portion of the rail till tight holding is achieved. When the trolley moves, the telescopic rods of the telescopic piles retract downwards and drive the connecting plates to descend, and the connecting plates drive the opposite-penetrating s