The invention discloses a clamp for dynamic balance detection on an engine crankshaft damping belt wheel. The clamp comprises an elastic expansion sleeve, a balance expansion core and a force applying assembly, wherein the elastic expansion sleeve is used for being arranged on the to-be-detected damping belt wheel in a sleeving manner, the balance expansion core is inserted in the elastic expansion sleeve and used for expanding the elastic expansion sleeve, and the force applying assembly is used for generating acting force making the elastic expansion sleeve move relative to the balance expansion core when the elastic expansion sleeve is expanded. According to the clamp for dynamic balance detection on the engine crankshaft damping belt wheel, it can be ensured that the crankshaft damping belt wheel cannot loosen during high-speed rotation, the positioning precision is high, accuracy of dynamic balance data is guaranteed, and the one-time yield of products is increased. Meanwhile, the dynamic detection efficiency of the crankshaft damping belt wheel can be improved, and the production takt stability and the balance production stability are guaranteed.