Self-propelled adjustable supporting plate trolley

The utility model discloses a self-propelled adjustable supporting plate trolley which comprises a door-shaped truss, an upper idler wheel is embedded in a horizontal frame body of the door-shaped truss in a sleeved mode, a lower idler wheel is embedded in the horizontal frame body of the door-shaped truss in a sleeved mode, and the bottom of the upper idler wheel is fixedly connected with a tie bar. Through the supporting plate, the hanging rod and the telescopic top support, the supporting plate is connected with the hanging rod in a hinged mode, adaptability to different groove forms is high, the device can be applied to vertical excavation of grooves and slope excavation of grooves with different slope rates, the telescopic top support can freely adjust the length of the telescopic top rod so as to meet the requirement for use under the conditions of different groove widths, and operation is convenient; a power generator, an air compressor, an air pressure control switch, a horizontal air cylinder piston