OBJECTIVE： To detect and analyze the related safety signals and general regularity of moxifloxacin induced tendon injury， and to provide reference for safe drug use in clinic. METHODS： By data mining， reporting odd ratio （ROR） method was used for keyword retrieval of safety signals of moxifloxacin from FDA adverse event database. The retrieval duration ranged from “2004/01/01” to “2016/12/31”， and the general name of target drug was “Moxifloxacin”. Data extraction table was established by using Microsoft Excel 2010， and safety signals of tendon injury were analyzed in respects of general information of patients， moxifloxacin use， etc. RESULTS： Among 16 543 adverse event reports with moxifloxacin as the primary suspect drug， top 10 safety signals were detected by using ROR method， including 4 safety signal of tendon （921 reports）. After exclusion， 477 cases of qualified report were included. After report analysis， mean body weight of the patients was （58.95±18.14） kg， female accounted for slightly higher than male （56.81％ vs. 42.14％）； average age was （50.55±15.43） years （18 to 91 years）. Most of tendon ADR occurred 1-7 d after treatment （59.54％）， median was 5 days； In drug combination， fluoroquinolones （36.79％） and glucocorticoids （31.60％） were most common. CONCLUSIONS： Among ADE signals of moxifloxacin， tendon injury signal have significant statistical relationship with adverse events， which indicates the attention should be closely paid to the occurrence of moxifloxacin tendon adverse events. The main risk factors affecting the tendon safety signal of moxifloxacin include senile， combined with hormone or other types of fluoroquinolones.