Lifting device for flywheel casing of engine

The utility model relates to a device used for lifting a flywheel casing. The device comprises a disc body, blades and a lifting hook, wherein the blades are fixed on the disc body; the disc body is connected with the lifting hook; and the blades can automatically open and close by manual control. After the blades are adjusted to a close state, that is, the external edges of the blades are smaller than that of the disc body, the whole blades and the disc body pass through an oil seal mounting hole of the flywheel casing, and two lugs of the disc body are clamped on the plane of the orifice of the oil seal hole of the flywheel casing. The blades are adjusted to an open state by manual control, the upper planes of the blades becomes bearing surfaces of the flywheel casing; and then a crane is started to lift the flywheel casing. The blades are locked by the weight of the flywheel casing so as to ensure that the blade cannot close and open automatically, thereby achieving the purpose of safely lifting the flywhe