Objective To investigate the effect of comprehensive treatment in the treatment of knee osteoar-thritis by taking orally and external Chinese medicine with ozone injected the joint cavity.Methods 834 patients with knee osteoarthritis(1 212 knee joints)were randomly selected,after two courses of the comprehensive treatment,with excellent,good,fair and bad four levels to evaluate the therapeutic effect.Results After two courses of comprehensive treatment,534 cases were excellent,461 cases were good,181 cases were fair,36 cases were bad,the fine rate was 82.1%.Conclusion The comprehensive treatment is an effective method in knee osteoarthritis by taking orally and external Chinese medicine with ozone injected the joint cavity.