Based on the online calibration correction principle of CINRAD return intensity and combined with the return intensity reception, calibration and transmitting power online measurement signal process of CINRAD/SA&SB, this paper analyzes and classifies anomalous phenomena of CINRAD return intensity in detail. In addition, it summarizes and puts forward analysis and handling methods for anomalous problems such as stronger or weaker returns, and the decreased return area of CINRAD. Moreover, it enumerates examples to solve CINRAD return intensity anomalies effectively. The result shows that using this method can improve timeliness and reliability of handling CINRAD return intensity anomalies.