讨论了关联双模ＳＵ（１，１）相干态场与级联三能级原子的相互作用对原子动力学行为的影响，也研究了双模场的量子统计性质随时间的演化。通过数值计算，发现了一些新的演化规律。 The influence of the interaction between the associated two-mode SU (1,1) coherent state field and the cascade three-level atom on the atomic dynamical behavior is also discussed. The evolution of the quantum statistical properties of the two-mode field with time is also studied. By numerical calculation, we found some new evolution rules.