给出了Ｔｏｄａ晶格中单孤立子的粒子运动速度的最大值，对特定的两孤立子的碰撞进行了分析，给出了碰撞前孤立子振幅的关系，如果两孤立子的振幅差别较大，方向相同，则在碰撞过程中粒子运动速度的最大值正好是原来二孤立子运动速度振幅之差，如果方向相反，则在碰撞过程中粒子运动速度的最大值正好是原来未碰撞前两孤立子运动速度振幅之和． The maximum particle velocity of a single soliton in the Toda lattice is given. The collision between two solitons is analyzed. The relationship between the amplitude of the soliton before the collision and the amplitude of the two solitons is given. , The same direction, the maximum particle velocity in the collision process is exactly the difference between the original two soliton motion velocity amplitude, if the opposite direction, the maximum particle velocity in the collision process is exactly the original non-collision before the two isolated Sum of the velocity of sub-movement.