Silver doped TiO2 photocatalyst TiO2-Ag was prepared by sol-gel-wave dry method in [Bmim]PF6 ionic liquid medium. Using methyl orange as an organic pollutant, microwave ultrasonic combiner in microwave (MW), ultraviolet (UV), ultraviolet-microwave (UV-MW) and ultrasonic-ultraviolet-microwave (UT-UV-MW) conditions The degradation of methyl orange solution was carried out, and the effect of silver doping on the degradation of methyl orange by catalyst was investigated to improve the photocatalytic performance of the catalyst. X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), energy spectrum analysis (EDS), thermogravimetry-differential scanning calorimetry (TG-DSC-DTG), solid UV-visible analysis (Uv-vis) And infrared analysis (IR) for the characterization of TiO2-Ag catalyst. The results showed that the degradation rate of methyl orange was 88.05%, 93.98% and 99 after degradation of methyl orange for 35 min under UV, UV-MW and UT-UV-MW conditions under optimized conditions. .84%; after degradation of methyl orange for 55 min, the degradation rates of methyl orange were 98.79%, 99.05% and 99.90%, respectively. After degradation for 25 min under UT-UV-MW conditions, the degradation rate is close to 100%. It is shown that the TiO2-Ag catalyst has a high photocatalytic degradation activity, and the microwave ultrasonic synergy accelerates the photocatalytic degradation reaction. The structural analysis of the catalyst shows that the silver doping inhibits the transformation of the titanium dioxide crystal phase, increases the phase transition temperature, and enhances the stability. At the same time, the catalyst broadens the photoresponse range to the visible region, improves the quantum efficiency, and thus the photocatalytic performance. Can be improved.