Abstract: This paper introduces a new type Cs atomic resonance filter(ARF)detected by photoionization. The theoretical analysis gives the inherent time response of 10 ns,the linewidth of 62 MHz and quantum efficiency of 86.6%. In current experimental apparatus, the preliminary measurements give ARF’s time response of 130 ns,quantum efficiency greater than 10.1%and critical signal laser energy of 3 nJ.A better results will be obtained while the experimental apparatus improved.