OBJECTIVE：To establish the quality standard of the Tibetan medicine Ma lus Fructus （known as the fruit of Ese ）， and to provide scientific reference for quality control and utilization of resource. METHODS ：The qualitative analysis of 20 batches of Malus Fructus with different producing areas and different origins was carried out by morphological observation ，microscopic and TLC identification. According to the method stated in 2015 edition of Chinese Pharmacopoeia ，water content ，total ash content and extract content were determined. HPLC method was used to determine the contents of 6 kinds of flavones （chlorogenic acid ， hyperin，isoquercitrin，quercitin，phloridzin，quercetin）in Malus Fructus. RESULTS ：The properties of this medicinal material were obovate ，spheroidal or oval ，its surface was reddish brown to dark red ，with slight shrinkage. Its taste was sweet ，sour and slightly astringent. The microscopic characteristics of the powder were clear ，the stone cells were scattered individually or clustered，and the pulp parenchyma cells contained calcium oxalate cube crystal and cluster crystal. The results of TLC showed that there were fluorescent spots of the same color in the chromatogram of the tested product and the corresponding position of the reference substance （ursolic acid ）. The content ranges of moisture ，total ash and extracts were 9.02％-11.39％，2.29％-3.35％， 37.12％-58.41％ respectively. The linear ranges of chlorogenic acid ，hyperin，isoquercitrin，，quercetin phlorizin and quercetin were 3.12-50，1.25-20，1.25-20，3.12-50，18.7-300，0.5-8 μg/mL（all r were not less than 0.999 7）. RSDs of prescision ，stability and reproducibility tests were all lower than 3.0％（n＝6）. The average recoveries were 97.56％，98.28％，106.14％，103.74％， 98.37％，98.76％；RSDs were 1.57％，1.62％，1.38％，1.99％，2.15％，2.31％（n＝6）. The content ranges of the above six components in 20 baches of samples were 0.001 5％-0.028 8％，0.005 9％-0.022 0％，0.008 7％-0.030 4％，0.019 4％- 0.048 5％，0.068 5％-0.199 8％ and 0.005 1％-0.081 4％. CONCLUSIONS ：Established method is accurate and stable ，and can be used for quality control of Malus Fructus. It is preliminarily Δ 基金项目：四川省科技计划项目（No.2020YFS0495）；“杏林学 proposed that moisture and total ash content should not exceed 者”学科人才科研提升计划（No.CXTD2018016） 12％ and 3.5％，and extract （by dry product ）and phlorizin ＊硕士研究生 。研究方向 ：中药品种 、质量与资源 。E-mail： content should not be less than 40％ and 0.1％ respectively. 1159020313@qq.com # 通信作者：教授。研究方向：中药品种、质量与资源。E-mail：