The invention discloses a material conveying device for building construction. The device structurally comprises a side edge protecting baffle plate, a material conveyor belt, a partition plate, a placing baffle plate, a front side protecting plate, a gravity detection device, supporting footed glass, a supporting disc base, an external latch caterpillar band, movable universal wheels, a supporting vertical rod, an inclined reinforcing bar, a conductive data line, a controller and a motor protecting shell, wherein the left end of the motor protecting shell is welded to the right end of the side edge protecting baffle plate. The material conveying device disclosed by the invention has the beneficial effects that by additionally arranging the gravity detection device on the equipment, the weight of a building construction material can be detected when the equipment is used for transporting and transferring the building construction materials and the weight of the building construction material can be detected, so that staff can better understand the weight of the materials intuitively, and therefore, the equipment is reasonably used to transport the building construction materials, the service life of the equipment is prolonged, and the equipment is emsured to be safely used and relatively practical.