如何运用平衡理论和杠杆原理指导学生正确认识和使用弓子对琴弦的压力，是克服手臂肌肉紧张僵硬的毛病，提高对琴弓的控制能力，使之能够随着运弓速度的快慢，弓子触弦角度的不断改变，始终保持最佳的运弓平面，以奏出悦耳动听的优美音质的重要基本功之一，对提高小提琴教学质量具有至关重要的作用。 How to use the theory of balance and leverage to guide students to correctly understand and use the bow pressure on the strings is to overcome the muscle stiffness and stiffness of the arm to improve the control of the bow to enable it to bow speed with bow speed, Constant changes in the angle of the string, always maintain the best bow plane, to play melodious and beautiful sound quality is one of the important basic skills, to improve the quality of violin teaching plays a crucial role.