The invention discloses a method for manufacturing a valve retainer, which comprises the following steps: arranging a sprue on a mould; and carrying out smelting, casting, demoulding, heat treatment and ground finishing on metal, wherein the mould is a directly molded mould for the valve retainer. Compared with the prior manufacturing method, the method for manufacturing the valve retainer saves four steps of sliping a head, boring an inner hole, digging up an excircle and cutting off. Therefore, the method simplifies the production steps, saves a large amount of labors, reduces the equipmentinput and energy consumption, shortens the production cycle and reduces the production cost.