Abstract: Single-Event Effect(SEE)is a hot research area in Integrate Circuits radiation hardening today.This paper put forward a particle-injected model based on Weibull function which characterized transient pulse directly.The experiment result proved that the precision of Weibull model come up to 98.41%compare with the current-pulse model,and it can improve simulation computer speed of circuits 3 orders.The model proposed in this paper has strong referenced value to study radiation hardened in VLSI circuits.