Electric knife gate valve has the advantages of simple and compact structure, reasonable design, lightweight and material saving, reliable sealing, lightweight and flexible operation, small size, smooth channel flow, small flow resistance, light weight, easy to install, easy to dismantle and so on. Knife gate valve gate has a shear function, can scrape the adhesion on the sealing surface, automatic removal of debris, stainless steel gate can prevent corrosion caused by seal leakage.