The invention relates to a plant pruning device and in particular relates to a plant pruning device for municipal gardens. Aiming at the technical problems, the invention provides the plant pruning device for municipal gardens, which can be used for reducing the labor intensity and has high pruning efficiency. In order to solve the technical problems, the plant pruning device for municipal gardens, provided by the invention, comprises an electric reeling wheel, a first sliding rail, wheels, a bottom plate, a first sliding block, a push handle, a first fixed plate, a rotary motor, a nut, a screw rod, a second fixed plate and the like, wherein the wheels are symmetrically connected with the bottom of the bottom plate from left to right; the wheels can freely rotate; the middle of the top of the bottom plate is connected with the first sliding rail through a bolt connection manner; and the first sliding rail is connected with the first sliding block in a sliding manner. According to the plant pruning device provided by the invention, the electric reeling wheel is matched with a pull wire, so that the adjustment work of the position of the pruning device is realized; and the screw rod and the nut are matched, so that the adjustment work of the height of the pruning device is realized.