Preparation device and preparation method for novel heat-resistant high-strength cast ingot for automobile piston

The invention provides a preparation device and method for a novel heat-resistant high-strength cast ingot for an automobile piston. The preparation device comprises a supporting frame and a guide rail. The number of the supporting frames is two. Guide rails are fixedly connected to the upper parts of the two supporting frames; the device is characterized by further comprising a slagging-off system; and the right part of the guide rail is connected with a slagging-off system for cleaning impurities on the melt surface. The gathering cover is always in contact with the furnace body, so that the melt is effectively prevented from being exposed in the external air, the dross is shoveled and collected by utilizing the obliquely arranged dross removing plate, and the dross moves obliquely upwards in the continuous mutual pushing process and is collected; the semispherical design at the bottom of the sampler is more gentle in impact on the melt, large fluctuation of the melt is avoided, a small amount of the melt i