The utility model provides an automatic change stamped signature assembly line, includes: belt conveyor system, including belt and servo motor, the belt is in servo motor's drive is slow the removal down, and drive place in contract on the belt removes together, stamped signature equipment, stamped signature equipment cover locates belt conveyor system's one end, including fixed bolster and seal exercise machine structure, seal exercise machine construct install in on the fixed bolster for clamp the seal and drive the seal up -and -down motion, and PLC electrical control component, PLC electrical control component with servo motor with seal exercise machine constructs the electricity and connects, is used for control servo motor with seal exercise machine constructs the automatic stamped signature of running realization. Through the utility model discloses an automatic change stamped signature assembly line, very big improvement work efficiency for the operating speed, realize high -efficiency operation, simultaneously still liberate the manpower, practiced thrift manpower resources, saved a large amount of costs for the enterprise.