When ethanol, 1,4-dioxane and water are used as the reaction solvent, the conversion rate of benzyl alcohol is low. When acetonitrile is selected as the reaction solvent, the conversion of benzyl alcohol is higher, and the selectivity of benzaldehyde reaches 98.79%. When dichloromethane, acetone, ethyl acetate and 1,2-dichloroethane are selected as the reaction solvent, a higher conversion rate of benzyl alcohol is also obtained, but the product is mainly benzoic acid. Ethanol and ethyl acetate have the same polarity, but the conversion rate of benzyl alcohol and product selectivity are quite different. It seems that the polarity of the solvent has little effect on the reaction, and the solvent's ability to dissolve oxygen is the main factor affecting the reaction effect. From the perspective of environmental protection, acetonitrile and ethyl acetate are selected as the reaction solvent from the above solvents to generate benzaldehyde and benzoic acid, respectively. To further study the influence of the solvent on the product selectivity, acetonitrile and ethyl acetate with different volume ratios were selected as the reaction solvents under the premise of keeping the volume of the reaction solvent unchanged (Table ). The results showed that as the volume of ethyl acetate increased, the conversion of the continued to increase, the selectivity of benzaldehyde decreased and the selectivity of benzoic acid increased, which indicated that the presence of ethyl acetate could make the reaction system more oxidative. The stability and recycling capacity of the catalyst is a key index to evaluate the performance of the catalyst. So, Ni@C/TiO2-Z recycling experiment was carried out.