Based on the analysis of the characteristics of pulsed jamming in wireless communication and its impact on wireless communication, a strategy for detecting the periodic pulsed jamming by using the power spectral density of the modified periodic pattern and Non-deterministic Polynomial(NP) theorem is proposed, and the method for measuring the parameters of pulse period and duty cycle is also presented. The probability of periodic pulsed jamming detection is deduced and calculated under the given false alarm rate index. The effectiveness and accuracy of the proposed strategy for detecting periodic pulsed jamming are verified through experimental simulation.