The invention discloses a detachable electromagnet for a test sorting machine. The detachable electromagnet comprises an electromagnet body and a push-pull rod arranged at the center of the electromagnet body, wherein the electromagnet body comprises a slide bearing, an inner sleeve, a coil and an outer sleeve, end covers are arranged at two ends of the electromagnet body, and the end covers are connected with the electromagnet body through connectors. The detachable electromagnet has the advantages that the detachable electromagnet is simple in structure and easy to manufacture, the detachable electromagnet is connected through the connectors, the slide bearing can be replaced independently, maintenance cost is reduced, and production cost is lowered; the slide bearing made of siliconized graphite materials is low in friction coefficient, resistant to abrasion, good in lubricating effect, long in service life, and the like; material drop of a suction nozzle is avoided, the production efficiency of the sorting machine is high, and the detachable electromagnet is worthy of popularization.