Hydraulic fixing roadside packing device of medium-thickness coal seam and use method of hydraulic fixing roadside packing device

The invention discloses a hydraulic fixing roadside packing device of a medium-thickness coal seam and a use method of the hydraulic fixing roadside packing device. The hydraulic fixing roadside packing device adopts a simple and practical structural form that each lower inner plate and each upper outer plate are ingeniously combined with one two-way telescopic hydraulic cylinder, so that the work intensity of the gob-side entry retaining roadside packing body building operation of the medium-thickness coal seam is greatly reduced; the semi-automatic function is realized, so that the construction efficiency of the packing body building process is greatly improved; and the erection of wood point posts is not needed, so that the construction cost is reduced, and the technical characteristics of simple structure, convenience in regulation, strong field applicability and the like are realized. When the hydraulic fixing roadside packing device of the medium-thickness coal seam is used, the moving of the hydraulic fixing roadside packing device is flexible; the operation is simple and convenient; time and labor are saved; and the climbing operation is not needed, so that the potential safety hazards due to climbing operation in the work process are reduced.