Objective To explore TCM syndrome distribution and its syndrome features of rheumatoid arthritis interstitial lung diseases（ RA-ILD）. Methods Collected clinical data of 320 patients with RA-ILD. Divided them into 4 syndromes as lung-kidney Qi-yin deficiency syndrome

lung and kidney Qi deficiency syndrome

lung and spleen Qi deficiency syndrome and kidney yang deficiency syndrome

according to Chinese Medicine syndrome differentiation. Observe the condition of blood routine examination

hepatorenal function

erythrocyte sedimentation rate（ ESR）

C reactive protein（ CRP）

immune globulin

autoantibody of patients of each syndrome type. Results There were 156 cases of lung-kidney Qi-yin deficiency syndrome in 320 patients

to account for 48. 8%

remarkably superior to other syndromes（ P < 0. 05）. The proportion of lung and spleen Qi deficiency syndrome in female patients was remarkably higher than that in male patients. The number of joint deformation in patients of kidney yang deficiency was remarkably less than that of other syndromes（ P < 0. 05）. The level of platelet（ PLT）

ESR

CRP

immune globulin M（ Ig M） were all remarkably higher than that of other syndromes（ P < 0. 05）. The titer of rheumatoid factor Ig M（ RF-Ig M）

rheumatoid factor Ig A（ RF-Ig A）

and rheumatoid factor Ig G（ RF-Ig G） in kidney yang deficiency syndrome was remarkably lower than in other syndrome types（ P < 0. 05）. Conclusion Lung-kidney Qi-yin deficiency syndrome is the main syndrome type of RA-ILD. Inflammation grades of lung and spleen Qi deficiency syndrome is the highest. The prognosis of kidney yang deficiency syndrome is the best.