A kind of columned circumrotate wave-cuttingmodulatorwhich can modulate the wave of space target’s radiation in 180 degrees is designed for the 8 ×8 pyroelectric infrared detector arrays.According to the readoutmethod of the ROM, the design of the readout integrate circuit and tiny current filter amplifying circuit is presented . The function of system is simulated through software and hardware. All the work make the foundation for the later research.