The piezoelectric coupling analysis of piezoelectric ceramics wafer(PW) and cement-based piezoelectric composite wafer(PCM0) on static analysis, modal analysis, harmonic analysis, and transient dynamic analysis was systematically studied by finite element numerical simulation, respectively. Furthermore, the material usage optimization of PCM0 was carried out with wafer radius(Rc) and density(Hc) as the design parameters. The results show that the maximum displacement vertical to polarization direction of PCM0 increases 10.9% compared with those of PW, indicating that the piezoelectric strain constant of PCM0 is increased; Its response frequency falls down and exhibits steady response characteristic. It can be acceptable for the impact on hysteresis effect of PCM0 with cement mixing. The optimal material usage for PCM0 wafer design is Rc of 5.1 mm, Hc of 0.76 mm, respectively.