在一定近似条件下，利用大学物理力学知识分析求解了长为L通有电流I的导线在长直电流激发的非匀强磁场中受到的合外力和合外力矩，通过数值方法求解得到了导线质心C的运动轨迹和导线转动角度的变化，进一步研究了导线在一个转动周期内的运动轨迹，并从速度参量和加速度参量的变化分析原因．

Under certain approximate conditions. The combined external force and combined external torque acting on a wire of length L carrying a current I in a non-uniform magnetic field generated by a long straight current were analyzed and solved using the knowledge of mechanics in college physics. The motion trajectory of the wire′s center of mass C and the change in the wire′s rotation angle were obtained through numerical methods. The motion trajectory of the wire within one rotation period was further studied. The reasons were analyzed from the changes in velocity and acceleration parameters.