The invention discloses a radar signal rapid recovery method for multi-pulse combination detection, which comprises the following steps of: coding the multi-pulse combination, and dividing the multi-pulse combination signal into n groups, wherein each group of m sub-pulses has equal time width, wherein m is more than 1, and n is more than 1; constructing a receiving window; continuously and circularly transmitting each sub-pulse signal at a set time interval, and receiving a corresponding echo signal through the receiving window in the time interval; decoding the received echo signal, constructing a grouping integer coefficient matrix of the echo signal based on the receiving window, and simplifying the recovery operation from convolution operation to matrix and vector inner product operation only comprising addition and subtraction operation to obtain a recovery signal; normalizing the recovery signal to obtain a target echo signal so as to achieve the recovery of a radar signal. According to the radar signal rapid recovery method for multi-pulse combination detection, the recovery operation is simplified from the convolution operation into the vector operation only comprising theaddition and subtraction operation, so that the rapid recovery of the radar signal is achieved, and the real-time signal processing is convenient to achieve.