Abstract: Firstly, the working principle of pseudo-random code phase-modulation fuze is described in the paper. The scheme of spot and deception jammer of pseudo-random code phase-modulation fuze is given. The circuit principle of each part and its hardware implemented circuit are presented. It includes mainly that demodulation of pseudo-random code phase-modulation signal ,recognition and reconstruction of demodulated code, modulation and transmission of interfered waveform .According to testing results of each part circuit, the designed principle is correct. The scheme is feasible.