The utility model relates to a hydraulic support keeps off coal protector with scalable gate -type. Hydraulic support is fixed, and the coal board that keeps off is passed in and out inconveniently, can not be stretched out and drawn back. This hydraulic support keeps off coal protector with scalable gate -type includes guard gate and adjustable fender, the two all includes the frame and fixes steel sheet in the frame net that punches a hole, the guard gate middle part is equipped with the reinforcing plate, be equipped with two sections pipes on the reinforcing plate, be equipped with the push -and -pull keeper in two sections pipes, articulated the fixing on adapted hydraulic support's a stand of frame of guard gate one side, adapted hydraulic support goes up another adjacent stand and directly or indirectly is equipped with the bolt ring, the push -and -pull keeper can insert or extract to tie and encircle, guard gate upper portion is equipped with the slot, adjustable fender just sets up in the slot to but the oscilaltion, it has a plurality of fixed orificess to open on adjustable fender's the frame, it has the pinhole to open on protection doorjamb's the relevant position to is furnished with the locating pin. The utility model relates to a rationally, easy and simple to handle, the reliability is high, extensively is applicable to in the mining industry production.