Facial mixing preception method was used to prepare the CdMoO₄/CNTs/g-C₃N₄. The novel Z-scheme samples were characterized by using XRD, SEM, FT-IR, XPS, UV-vis, PL, EIS and photocurrent response. The photocatalytic activity of the catalyst was measured by degradation of tetracycline hydrochloride (TCH) under visible light. The optimal photocatalytic degradation efficiency of 10 wt% CdMoO₄/CNTs/g-C₃N₄ was up to 85.3%, which was higher than CdMoO₄, CdMoO₄/CNTs and g-C₃N₄. The enhanced photocatalytic performance of the heterojunction was attributed to the highly separation efficiency of photogenerated electron-hole pairs. A Z-scheme system was produced in CdMoO₄/CNTs/g-C₃N₄ with the doping of CNTs.