In modern electronic warfare， the competition between electronic interference and anti-interference is becoming more and more fierce， which has become a hotspot in the radar countermeasure field to develop the identification algorithms for radar active jamming. This paper analyzes the radar active jamming recognition algorithm in details， and summarizes the general process of jamming identification methods in the world. Firstly， the types of common radar jamming are divided， and the jamming mechanism and the signal model of current common radar active jamming signal are introduced in details. Then from the feature-extraction means and the design of the classifiers， the flow of the jamming identification algorithm are analyzed comprehensively. Finally， the future development directions of the radar active jamming identification algorithms are prospected.