OBJECTIVE： To investigate the reliability and validity of the Chinese version Morisky Medication Adherence Scales-8 in assessing medication compliance of the patients with rheumatoid arthritis. METHODS： The Chinese version of MMAS-8 was used to evaluate the compliance of 200 rheumatoid arthritis patients who responded to the WeChat public issue from the public forum of China rheumatism.Item analysis， homogeneity test， reliability analysis， and validity analysis were all conducted. RESULTS： The eight items showed significant difference between the two extreme groups as head and tail 27％ of the total score in Levene method F test （P＜0.001）. t test of variance inequality was adopted， with significant difference （P＜0.001）. Correlation coefficient between the 7 items and the total score was higher than 0.400， and the 8 items were significantly correlated with the total score （P＜0.001）. Internal consistency reliability coefficient Cronbach’s α was 0.657， and standardized Cronbach’s α was 0.662. For construct validity， KMO was 0.638， Bartlett’s sphericity test was 246.278， factor analysis method was adopted to extract 3 common factors， and explainable total variance was 58.846％. Pearson correlation coefficient was 0.435 between MMAS-8 total score and MA-VAS score （P＜0.001）. CONCLUSIONS： Reliability and validity of the Chinese version MMAS-8 for the determination of medication compliance in patients with rheumatoid arthritis are good.