Bottom adjusting device for hydraulic support

The utility model discloses a bottom adjusting device for a hydraulic support. The bottom adjusting device comprises an outer main reinforcement of a hydraulic support base, an inner main reinforcement of the hydraulic support base, a fixed base, a bottom adjusting jack, a jack guide cylinder and a connecting plate. The fixed base is inserted in the outer main reinforcement of the hydraulic support base, the fixed base and the inner main reinforcement of the hydraulic support base are welded, and the jack guide cylinder is inserted into the fixed base. The bottom adjusting jack is inserted into the jack guide cylinder, and the connecting plate is fixedly arranged on the surface of the outer circle of the rear end of the jack guide cylinder and located on the outer side of the outer main reinforcement of the hydraulic support base. A cross-shaped fixing groove is formed in the front end face of the jack guide cylinder, a piston rod of the bottom adjusting jack extends forwards, and a stopping block capable of being inserted into the cross-shaped fixing groove is arranged at the front end of the piston rod of the bottom adjusting jack. According to the bottom adjusting device for the hydraulic support, the deflecting condition of the hydraulic support base can be adjusted, mounting and dismounting are facilitated in the using process, and the complexity in processing is lowered.