Preparation method of MIM tungsten alloy

The invention relates to the technical field of metal powder injection molding processes, and particularly discloses a preparation method of an MIM tungsten alloy, and the preparation method of the MIM tungsten alloy comprises the steps that Ni, FeCo alloy and W are mixed and ground to prepare tungsten alloy mixed powder; adding ethanol and alkali metal oxide into the tungsten alloy mixed powder, and carrying out ball milling to prepare modified tungsten alloy powder; adding a binder into the modified tungsten alloy powder, kneading and granulating to prepare a tungsten alloy feed; and the tungsten alloy feed is subjected to injection molding, degreasing and sintering to obtain the required tungsten alloy. The preparation method can directly form the tungsten alloy product, and is simple to operate, mild in preparation condition, low in preparation cost and suitable for large-scale production; tungsten alloy mixed powder raw materials are selected, the dosage of the raw materials is controlled, tungsten alloy