With the continuous extension of No.15 coal mining face in Wenjiazhuang Coal Mine, the original belt conveyor can not meet the transportation needs of the new working face. Therefore, this paper proposes two kinds of technical transformation schemes, and through economic analysis and technical comparison analysis, the scheme of two belt conveyors is selected, and the new third belt conveyor is selected and designed in detail. The practice shows that the selected equipment is scientific and reasonable, the operation is safe and stable, and the economic benefit is good. It provides scientific basis and technical support for the selection and design of belt conveyor in No.15 coal seam of Wenjiazhuang Mine.