The invention relates to a key with two rows of teeth. The key comprises a handle part and a key body, wherein the key body is formed by punching an iron sheet, stainless steel or stainless iron with thickness of 0.5 to 0.7mm and has a U-shaped section; the upper parts of two sides of the U-shaped body are respectively provided with teeth in different tooth forms; and the handle part is injection molded and is connected with the body. A method for manufacturing the key body with the two rows of teeth comprises the following processes of: (1) blanking, namely blanking the stainless steel, the stainless iron or the iron sheet on a punch to form a body plane blank according to the design size; (2) punching the teeth, namely punching the tooth forms on the two side edges of the front part of the body plane blank on the punch at one time according to the design requirement; and (3) forming, namely putting the body plane blank with the two rows of teeth on the punch with a U-shaped male die and extruding to form the key body with the U-shaped section.