Abstract: Self-adaptive side-lobe cancellation and side-lobe blanking technologies are usually adopted in air defence radar to eliminate interference from side-lobe.The former is mainly used to reduce continuous clutters while the latter for pulse-type clutters.One problem existing in side-lobe blanking is that when pulse-type clutters fill in the whole range channel,the blanker suppresses not only the clutters but the target signals as well,thus loses its detection ability.A combination of cancellation and blanking technology is proposed,which can not only settle the existing problems in side-lobe blanking but also enable the radar to effectively eliminate continuous and pulse-type clutters interference from side-lobe.