A guidance method based on terminal angle limit was researched. By deduction, the relationship between target velocity direction and LOS angle velocity was found in LOS coordinate system, and intercept model based on terminal angle limit was built. Furthermore, on the basis of model nonlinearity, the double ring sliding mode guidance law was designed and sliding mode approach rate was also chosen reasonably. The simulation result explained the effect of this method could reduce attack angle and target-missing quality, the aim of direct rail or reverse course interceptor effectively was targeted.