The slurry valve is divided into clip type and integral type, and the "U" and "T" composite structure are used for the sealing of the clip valve body. The integral body seal adopts the "O" type compound seal ring structure, which overcomes the disadvantages of easy displacement and deformation and medium leakage after the force of "U" type sealing pad used in the original pinch type slurry valve. The knife gate structure is adopted to solve the problem of the valve closing, the valve leakage and leakage. It has the advantages of reasonable structure, convenient operation, quick opening, wear resistance, corrosion resistance, long service life, strong interchangeability, convenient assembly, low maintenance cost, high economic benefit, reliable sealing and avoiding "gnawing ring" phenomenon. It is suitable for the cut-off of granular material conveying pipeline in mining, metallurgy, coal, chemical industry, power plant and other industries, It is the first choice of slurry conveying system.