Abstract: S[Objective] In order to reflect the local climate characteristics and resource advantages, improve the competitiveness of "famous and excellent" agricultural products, and serve for Yuanjiang County pitaya industry. [Method] By collected the data of growth period, food composition and meteorological observation data of Pitaya fruit, the multiple linear regression equation between the components of soluble solids, anthocyanins, vitamin C and meteorological data of pitaya fruit and meteorological data was determined through expert consultation and mathematical statistics analysis, and the weight was determined to obtain the formula of the climate quality certification index of Pitaya fruit. [Result] Based on the idea of normalization, the formula of climate quality certification indicators obtained by determining the weight can be flexibly adjusted according to the increase of actual samples. At the same time, the artificial evaluation factors such as garden management level and disaster grade were not introduced. The regression equation of the content of edible ingredients mainly includes meteorological factors such as temperature, humidity and irradiance, which was consistent with the previous research results. [Conclusion] According to the formula of certification index, the certification score of a batch of pitaya fruit in the orchard in 2018 was above 90 points, which reached the "excellent" grade. The certificate of climate quality of agricultural products was issued to the applicant, and the two-dimensional code of certification traceability was provided for the company to bi listed on the market.