In order to study the quantum radar′s survival performance in different quantum interference,the interference level was defined based on quantum fidelity,detected photon′s survival function was proposed . According to the quantum damage model of different interference level ,the survival function of quantum radar was established. The influence of different level of interference and quantum survival factor on the quantum radar′s survivability was analyzed. The simulation results show that when the detected points of target is 40 and the interference level is 2,the quantum radar′s survival function is 0.9;when disturbance level is 6,the survival function decreases to 0.5. When the quantum survival coefficient is 0.9,survival function can reach 0.9. When survival coefficient dropped to 0.5,the survival function decreased to 0.6. The quantum radar′s survival function can be used as the basis of researching quantum radar survivability. According to the influence of various quantum interference and setting the appropriate parameters,the survivability of the quantum radar can be improved.