The invention discloses a large mining height shield type low caving coal hydraulic support. The support comprises a base, a top beam and a shielding beam, wherein an upright post is arranged between the top beam and the base; the upright post is a double telescopic upright post; the inner diameter of the large cylinder body of the upright post is more than or equal to 500mm; and the expanded height of the upright post is more than or equal to 4m. A push device is arranged in the middle of the base, the front end of the push device is connected with a front scraper conveyor; a pull back sliding device is arranged outside the base; and the rear end of the pull back sliding device is connected with a back scraper conveyor. A coal feed mechanism comprises a tail beam and a tail beam jack; a flashboard and a flashboard jack are arranged in the tail beam, and the end part of the flashboard is provided with a conical tooth for crushing range coal; and the upper oscillation angle of the tail beam is between 10 and 15 degrees, while the lower oscillation angle is between 40 and 45 degrees. The support can be applied to primary top-coal caving mining for super high coal seam with support height of over 4 meters, thickness of a coal placement layer of over 16 meters and good top-coal caving performance, and improve the production efficiency of a sub-level caving working face and the resource recovery rate.