The invention discloses a high-order multi-time conjugate lag-product intra-pulse analysis method. The method comprises the steps of obtaining a radar observation signal model, obtaining an n-order q-time conjugate lag-product of the radar observation signal model, obtaining an output signal-to-noise ratio of the lag product of a radar observation signal according to the amplitude A and a variance sigma 2 of the radar observation signal, conducting segment processing on the radar observation signal, conducting filtering treatment on the radar observation signal which is subjected to segment processing, and conducting discrete Fourier transform on the radar observation signal which is subjected to filtering pretreatment to obtain an energy statistics analysis graph for representing the recognition performance of the radar observation signal. Convenience can be brought to obtaining of modulated information in an intercepted and captured signal pulse, the high-order multi-time conjugate lag-product intra-pulse analysis method is conducive to judgment of functions and features of a radar transmitter, and basis is provided for separation of signals, estimation of signal parameters, identification of radiation sources and the like.