根据反散射理论讨论了电流脉冲法产生磁通孤子的阈值条件。对甚长结作的数值实验与理论符合很好。对有限结，考虑到边界效应，电流台阶范围等因素，对孤子激发条件有额外的要求，对圆对称环域结用脉冲法激发了孤子，并分析了其中回波效应、外磁场等对激发条件的影响。所有结果表明，电流脉冲法是在Ｊｏｓｅｐｈｓｏｎ结中激发孤子态的有效方法，理论阈值条件可以提供有益的参考作用。 According to the theory of backscattering, the threshold condition of flux soliton generated by current pulse method is discussed. The numerical experiment on very long knots is in good agreement with the theory. For the finite junction, considering the boundary effect, the current step range and other factors, there are additional requirements for the excitation conditions of the soliton. The pulsed excitation of the soliton is carried out for the circularly symmetric ring domain, and the effects of the echo and the external magnetic field on the excitation Conditions of influence. All the results show that the current pulse method is an effective method to stimulate soliton states in the Josephson junction. The theoretical threshold conditions can provide a useful reference.