Multi-center Clinical Study of Guli Capsules in the Treatment of Knee Osteoarthritis

Inclusion Criteria: * Ages between 40 and 70 years, both gender * Kellgren and Lawrence grades of I to III; * The subjects volunteered participate in the study and complied with the regulations and signed the written consent voluntarily. * Meet the following clinical and radiological criteria for diagnosis: * Clinical criteria: 1. most of the time have knee pain nearly a month 2. bone fricative 3. morning stiffness is less than or equal to 30 min 4. age is more than or equal to 38 years 5. bony enlargement. Who meet (1) + (2) or (1) + (4) + (5) can be diagnosed as knee osteoarthritis. * Radiological criteria: 1. most of the time have knee pain nearly a month 2. the X-ray showed osteophyte formation 3. joint fluid examination confirmed with osteoarthritis 4. age is more than or equal to 40 years 5. morning stiffness is less than or equal to 30 min 6. bone fricative. Meet (1) + (2) or (1) + (3) + (5) + (6) or (1) + (4) + (5) + (6). Exclusion Criteria: * Patient with a history of allergy to similar constituents or chemical components of the drug; * Patients with limited liver and kidney function; * Patients with hematopoietic system disease; * Patients with diabetes, Cushing's syndrome and other endocrine disorders; * Patients with severe heart and brain disease; * Patients with low immunity; * Patients directly involved with the staff in the study; * Women during pregnancy or lactation; * Participating in other clinical studies or Participated in 3 months; * The investigators judged who be unfit for the study.