The invention discloses an intra-mold side direction cold heading process for signal lamp contact chips. The intra-mold side direction cold heading process comprises the following steps of 1, productmachining and analysis; 2, mold machining; 3, product machining and production; and 4, product inspection. According to the intra-mold side direction cold heading process, two molds which are used separately in the prior art are designed into two correlative molds; mold improvement is conducted on the machining process of the pin part; the second mold is designed for the pin part and mounted intothe first mold for semi-finished product machining, so that a master mold is formed between the first mold and the second mold; a product does not need to be taken out of the first mold in the subsequent product machining process; machining of the whole product is completed on the master mold; the defective percentage is lowered, and production efficiency is improved; and in addition, the manual labor intensity is lowered, and the structural design is more ingenious and more reasonable.