Impeller and ventricle auxiliary device

The invention provides an impeller and a ventricular assist device.The impeller comprises a hub and at least one blade fixed to the periphery of the hub, the hub comprises an inlet end and an outlet end, the blade comprises an acting face, the contour line of the acting face comprises an outer edge molded line away from the hub, and the end point, close to the inlet end, of the outer edge molded line is a molded line starting point; the end point, close to the outlet end, of the outer edge molded line is a molded line end point; the outer edge molded line is a smooth space curve, the curvature of the outer edge molded line in the axial direction of the hub is gradually reduced in the process from the initial point of the molded line to the end point of the molded line, and meanwhile the curvature change rate of the outer edge molded line in the axial direction of the hub is also gradually reduced. According to the impeller and the ventricle assisting device, blood flows smoothly when flowing through the actin