The designing of missile fuze was based on the research of the targets near field characteristic, it was necessary to study and analyze the targets near-field characteristic the targets near field scattering characteristic model of pseudo-noise code phase modulation pulse Doppler fuze are established by multiple scatter point synthesized method, in order to get the multi-point target s Doppler signal when this fuze locates in the target electromagnetic scattering near field of the target. Moreover, the variable law of multi-point target's Doppler signal and its frequency spectrum are also discussed. Based on the above findings, the simulation results of the influences of the size of multi point target and the miss distance on the Doppler signal frequency spectrum are given.