At present，CO₂fracturing technology faces many challenges of low viscosity and poor sand carrying capacity. The thickened liquid CO₂ fracturing fluid（TLCFF）was prepared by add a new thickener FAL-16（fluorine ether carboxylate surfactant） and auxiliary additive FAL-31（complexing metal ion（aluminum）organic salt）at the dosage of 1% into the liquid CO₂，and the rheological properties of the TLCFF were evaluated by a high pressure pipeline rheological experimental device. The results showed that，the viscosity of the liquid CO₂ fracturing fluid could be improved significantly by adding 1% FAL-16 and 1% FAL-31，and the viscosity of the TLCFF was up to 20 mPa·s（20 MPa，0℃，393 s^-1），which was 86—498 times higher than that of pure CO₂. The TLCFF showed the characteristic of shear thinning，the viscosity decreased exponentially with the increase of temperature. With the increase of temperature，the flow index n of the TLCFF increased，while the consistency coefficient k of the TLCFF decreased.