Pressure-stabilizing valve for liquid pipeline

The invention provides a pressure-stabilizing valve for a liquid pipeline. The pressure-stabilizing valve comprises a valve body, wherein a liquid inlet is formed in one end of the valve body; the inner side of the liquid inlet comprises an inner concave surface; a liquid outlet is formed in the other end of the valve body and comprises a through hole of which the inner wall is gradually reduced from the direction of the liquid inlet to the liquid outlet; a valve rod is movably connected to the inner part of the valve body through an elastic element; the electric element forms an elastic forcepointing to the direction of the liquid inlet between the valve body and the valve rod; one end, facing the liquid inlet, of the valve rod, is matched with the inner concave surface; preset distanceis formed between the other end, facing the liquid inlet, of the valve rod and the inner concave surface when the valve rod is positioned at the maximum point of shift motion in the direction of the liquid inlet; the end, faci