The invention discloses a PCR identification method for an equine derived constituent in a traditional Chinese medicament, which comprises the following steps of : a), extracting DNA from the traditional Chinese medicament; b), performing PCR amplification on the DNA with an equine derived special primer pair designed according to a satellite sequence with equine specificity to form an amplified product; and c), performing electrophresis on the amplified product, judging whether a positive amplified strip is amplified on the DNA or not according to an electrophresis result, wherein if the positive amplified strip is amplified on the DNA, the traditional Chinese medicament is derived from an equine animal and contains equine derived material, and if the positive amplified strip is not amplified on the DNA, the traditional Chinese medicament is not derived from the equine animal and does not contain any equine derived constituents. The method of the invention is simple, sensitive and rapid in operation and low in cost, can effectively identify an equine derived product, is particularly suitable for the identification of a deeply processed horsehide gelatin which has low DNA content and very short fragment caused by deep processing, and is suitable for massive popularization and application.