This paper analyzes the correlation between the isokinetic muscle strength of the upper limbs and the special performance of Chinese elite disabled male weightlifters, finds the biomechanical indexes that are significantly related to the performance of the powerlifting, and finally establishes the multiple linear regression equation of the performance of the powerlifting.MethodsThe Cybex-norm isokinetic force measurement system is used to test the flexor and extensor muscle groups of the upper limb joints of disabled weightlifters of the National team, to explore the isokinetic muscle force characteristics of the upper limb joints. Pearson correlation analysis was conducted between the isokinetic muscle force indicators of the upper limb and the special results, to establish the multiple linear regression equation of the Powerlifting performance.Results(1) Shoulder extensor muscle difference and flexor muscle difference are 10% and 12%, and the peak torque ratios of left and right flexor and extensor muscles are 1.16 and 1.15; Elbow extensor muscle difference and flexor muscle difference are 11% and 10%, and the left and right flexor and extensor peak torque ratios are 0.60and 0.64; (2) Right shoulder extensor PT/BW, left shoulder flexor PT/BW and left F/E were moderately positively correlated with relative powerlifting performance, but the results were not significant (p>0.05). The PT/BW of the right elbow extensor muscle was highly significantly positively correlated with the relative powerlifting performance (p<0.01); (3) The regression equation of strength powerlifting is as follows: Y=2.216+0.922x₁+2.806x₂-1.444x₃.Conclusion(1) The isometric muscle strength of shoulder and elbow joint of Chinese elite disabled male weightlifters is higher than that of the general population, the strength of the homonymic muscles on both sides is balanced, and the F/E is in line with the characteristics of powerlifting; (2) The determination coefficient R² of the regression equation of male strength powerlifting is 0.987, which can effectively predict the results of powerlifting. It is suggested that we should select athletes with strong elbow extensor muscle during selecting disabled weightlifters.