The catalytic performance of syngas to light olefins (STO) can be further enhanced by zeolite modification in bifunctional catalyst composed of metal oxide and zeolite. In this work, SAPO-34 zeolites were hydrothermally synthesized by modification of different metals Me (Ce, Zn, Zr) and various Zr doping contents, after physically mixed with GaZrOx metal oxide, the catalytic performance of prepared GaZrOx/SAPO-34 for STO was studied. XRD, TEM, SEM-EDS, BET, FT-IR, NH3-TPD and XPS were selected to characterize the zeolites. It is found that the synthesized SAPO-34 samples all possess CHA structure, the doping of Zr increased the relative crystallinity and reduced the particle sizes of the zeolites. When the doping content of Zr is 1.0% (n(ZrO2)：n(Al2O3) = 1 : 100), the synthesized 1.0%ZrSP-34 zeolite exhibits the smallest particle size, with an average particle size of 0.53 μm and a moderate amount of strong acid (1.34 mmol/g). The doping of 2% Zr results in the formation of ZrO2 on the surface of zeolite, covering the strong acid center. Compared with the unmodified SAPO-34 sample, the 1.0%ZrSP-34 prepared by doping of 1.0% Zr combined with GaZrOx enhanced the CO conversion from 14.2% to 21.2%, with the selectivity of light olefins improved from 71.0% to 82.4%, moreover, this catalyst shows almost no deactivation after a reaction time of 60 h.