The invention discloses a later-segment material arrangement device of a belt conveyor, and belongs to the field of conveyors. The later-segment material arrangement device of the belt conveyor comprises a primary material arrangement device and a secondary material arrangement device, wherein the primary material arrangement device comprises a first portal frame, a vibration installation beam and a vibration rod; a traction steel wire on a first winch bypasses the top part of the first portal frame so as to be connected with the vibration installation beam; the vibration rod is arranged on the vibration installation beam; the first winch drives the vibration installation beam to move along a height direction of the first portal frame; the secondary material arrangement material comprises a second portal frame, a lifting support and a material arrangement compression roller; a lifting steel wire on a second winch bypasses the top part of the second portal frame so as to be connected with the lifting support; the material arrangement compression roller is arranged under the lifting support; the second winch drives the lifting support to move along a height direction of the second portal frame. According to the later-segment material arrangement device of the belt conveyor provided by the invention, materials can be tightly compacted, the production of dust is reduced, a conveying environment is improved, and the material conveying efficiency is improved favorably.