The invention discloses a material transport device for a mountain photovoltaic power station and a use method of the material transport device and belongs to the technical field of mountain photovoltaic power station material transport. The material transport device comprises a conveying device, and the conveying device comprises conveying wheels, supporting plates and a conveyer belt. The left side and the right side of the upper supporting plate are provided with vertical baffles, the conveyer belt is uniformly provided with a plurality of isolation plates, the length of the vertical baffles is N times the distance between every two adjacent isolation plates, and each vertical baffle is uniformly and equally divided into N segments. The upper supporting plate arranged between the two vertical baffles is divided into N segments from bottom to top in sequence, wherein the segment number of the supporting plate is the same as that of the vertical baffles. A pressure sensor is embeddedto the center of each segment of the upper supporting plate, the vertical baffle located at the lowest end is provided with a central processing unit and a control panel, and the central processing unit is electrically connected with the control panel, the pressure sensor and drive motors. Abrupt-slope material transport of the photovoltaic power station is facilitated, materials can be transported to different heights, operation is simple, and the automated degree is high.