Abstract: A new signal procession method for the pseudo-random frequency hopping(PRFH) fuze based on signal reconstruction was proposed in the study in order to solve the problem of poor fixed distance precision and difficult engineering implementation of the fuze. First, a set of local reference signals used for the matched filter were reconstructed by using the transmitted signal. Then the local reference signals were applied to coherent integrate with the target echo, respectively. When the correlation value of any channel exceeds the presupposed threshold, it could be taken as fixed distance successfully. The simulation results showed that the method could solve these problems causing by mismatched filter, such as detecting the target precisely, the poor fixed distance precision and the high false alarm probability.