Abstract: Compared with the existing mature simulation technology of Cadence, the theoretical simulation technology based on wave digital filter (WDF) showed a non-convergence phenomenon in the simulation process of some analog circuits. In this paper, a variety of circuit structures composed of resistors, capacitors and inductors were simulated in Matlab and Cadence simulation environments. The simulation results were compared and analyzed. Finally, three optimization schemes were proposed to overcome the non-convergence phenomenon with WDF theoretical simulation technology.