Abstract: Metal oxide semiconductor gas sensors are exhibiting great application prospects in the field of toxic and hazardous gas detection gradually, but metal oxide semiconductor sensors are commonly affected by ambient humidity during detection, which significantly limits their applications. In this paper, WO₃ nanosheets were successfully in situ grown on the surface of ceramic tubes by hydrothermal method, and ZIF-67 porous materials were grown on the surface of ceramic tubes using it as substrate. Different ZIF-67/WO₃ composites were prepared by adjusting the proportion of W and Co. The structures and morphologies of different ZIF-67/WO₃ composites were analyzed via XRD, SEM, FTIR and BET techniques. The gas sensing properties of the pristine and different ZIF-67/WO₃ composites are investigated. The results indicate that the ZIF-67/WO₃(1∶1) composite which W∶Co molar ratio is 1∶1 has the best performance with excellent selectivity to trimethylamine (TEA) at 220℃, and high response of 140.34 to TEA gas with volume fraction of 100×10⁻⁶. The response/recovery time is 9 s and 7 s, respectively. The effect of air relative humidity (RH) on the sensors has also studied. The results show that the ZIF-67/WO₃(1∶1) sensor can maintain a good response value in an environment humidity up to 75%RH and has a good moisture resistance compared with the pristine WO₃ gas sensing material.