Abstract: Based on the 1969 ground observation data of Chongqing and the national grid real-time analysis products, the 12 kinds of factor products of CLDAS and CMPAS were compared and evaluated. The applicability of the real-time products was tested by using error index and hierarchical evaluation method. The results showed that the nighttime error of the 2m temperature hourly product was less than the daytime error, and the applicability of each region was ranked from high to low in west, central, southeast and northeast of Chongqing, with MAE were 0.73℃, 0.74℃, 0.81℃ and 1.05℃, respectively. The absolute error of CMPAS hourly and daily precipitation products in southeastern Chongqing is the largest, and the error in the other three regions is not much different. The error of two-source and three-source hourly precipitation products is not much different, and the cumulative precipitation is that the three-source product is better than two-source products. The error of hourly precipitation porducts increases significantly in summer and reaches its peak in July. The monthly variation trend of CLDAS visibility products is consistent among all regions, with underestimation as the main trend. It is overestimated in low visibility weather, In general, the quality of the national-level CLDAS and CMPAS products is relatively high, and appropriate products should be selected for different regions and time periods.