Manufacturing method for casting metal lithium target

Provided is a manufacturing method for casting a metal lithium target. A casting die for metal lithium is prepared according to the needed size, a stainless steel liner tube is located in the middle of the die, and cooling liquid can be injected into the stainless steel liner tube; liquid metal lithium is injected into a sandwich layer between the die and the stainless steel liner tube, and after the liquid metal lithium is solidified and formed, a metal lithium rotating target of the target size is formed through outline processing. The bottom-to-top directional solidification manner is adopted, the process is simple and convenient, and the high-purity metal lithium target which is small in grain size and high in compactness can be manufactured by eliminating air holes and shrinkage cavities in the metal lithium target. Casting conditions are optimized in the casting process, the flaw detection yield of the metal lithium target can be increased, and therefore the metal lithium target can be better applied to electrochromic glass.