Aimed at the problems that radar is a normal way used in tracking target at the battlefield, when hostile force uses active suppressing interference, the target trace is lost, and the radar fails to track target continuously, this paper builds a radar tracking system based on cooperative detection of airborne multi-sensor resource in interference to improve tracking property for target. Firstly, the paper predicts the radar lost information by Kalmansmoothing. When tracking precision can’t make the desired value satisfied, the paper estimates the lost data and continues Kalmansmoothing estimation by applying the method of SVMR, thus achieving to track the target continuously, and the precision is higher. The simulation proves that the system can solve the lost problem of target trace under condition of active suppressing interference, thus enhancing radar tracking property for target.