In view of the factors affecting the supportability of radar equipment are numerous and hierarchical, according to the requirement of radar equipment supportability, an index system of supportability evaluation of radar equipment is constructed. The comprehensive adjustment method is used to adjust the initial comprehensive value, so as to improve the problem that the overall comprehensive evaluation value in the catastrophe progression method is close to one, thus more intuitively reflect the size and level of the evaluation value. A supportability evaluation model of radar equipment based on improved catastrophe progression method is designed. The example shows that this method can evaluate the supportability level of the radar equipment scientifically and effectively.