[en] The movable coil electromagnet drive system is a completely new scheme for reactor control rod. Curves of dynamic displacement and curves of its offset value are given. Experimental results show that the drive system runs smoothly and does not vibrate at all; steady transform can be realized among every condition. High location precision and dynamic carrying capacity meet the requirements of design. Displacement needs offset when it is measured indirectly, and the offset value is related with load and electric current of coil