Hydraulic support capable of realizing top coal caving and filling operation

The invention discloses a hydraulic support capable of realizing top coal caving and filling operation. The hydraulic support is a support filling device used for mining unexploited coal 'below a building, a railway and water and above pressure-bearing water', the hydraulic support comprises two groups of bases and top beams, the bases are hinged to the top beams through four vertical columns, a tail beam is hinged to the rear end of each top beam, the angle of each tail beam is changed by a tail beam jack, a baffle is hinged below each tail beam, the baffles and the tail beams can be closed, and an inserting plate and an inserting plate jack are arranged on the inner side of each baffle. The top of a gob can be supported, and the top beams and the tail beams further can serve as top coal caving channels when a top coal bed is minded. When the gob needs to be filled, the tail beams can function in supporting the top of the gob, the tail beams, the baffles and the inserting plates jointly function as a box pla