排球运动的发展是一个不断寻求攻守平衡的过程，进攻技术的发展，迫使拦网技术得到飞速发展，如果没有很强的拦网意识、判断能力，不能掌握正确的起跳时机，就不能对付强大的进攻。所以，拦网的起跳时机是战术拦网及拦网成功的决定因素。一般来说，拦网起跳时机要根据二传球离 The development of volleyball is a process that constantly seeks offensive and defensive balance. The development of offensive technology has forced the development of block technology to develop rapidly. Without a strong block awareness, judgment ability and failure to grasp correct takeoff time, it is impossible to cope with a strong offensive. Therefore, block the timing of the jump is the tactical block and block the success of the deciding factor. In general, blocking the opportunity to take the second pass