Objective To judge the joint movement of the subjects of rheumatoid arthritis and its correlation with rheumatoid factor though the application of 320CT motion imaging function. Methods Choice 20 cases of rheumatoid arthritis, and bilateral wrist joint. Study of the wrist joint, and measure the deflection of the ulnar side, the deflection of the radial side, the activity of the ulnar radial side, and the level of serum rheumatoid factor though the application of 320CT motion imaging function. Results Paired test results of the ulnar side of the wrist of the participants: P=0.494. T test results from the angle of the radial side of the receiver: P=0.309. Paired t test results of the ulnar radial activity of the subjects: P=0.187. Correlation test between the ulnar deflection and the serum levels of rheumatoid factor: r=-0.373, P=0.021. The correlation between the radial side of the test and the test of rheumatoid factor in the radial side of the test: r=- 0.509, P=0.003. The correlation between the level of activity of the ulnar radial side of the test and the rheumatoid factor in serum: r=-0.440, P=0.007. Conclusion There was no difference in the degree of the movement of the wrist in the patients with rheumatoid arthritis, and there was a negative correlation between the motor function of the wrist and the rheumatoid factor.