DJ big dip angle conveyor guard with general belt conveyors of simple structure, reliable operation and convenient maintenance and other advances, conveying with bigger angle, compact structure and covers an area of less, with the development of big hoisting height and big throughput, it has been more widely used. Guard is consist of baseband, rib and the baffle plate, baseband appearance with ordinary conveyor, but the lateral stiffness is greater, and rib is wavy, baffle plate can be divided into T, C type and TC type according to the base of different section. T is suitable for occasion that angle β acuities 40°, C is suitable for angle β>40° and material liquidity good occasion, TC is suitable for angle β>40°, material viscosity great occasion.