Abstract: For the problem that the release lever of a tractor clutch control mechanism is broken, it is analyzed by finite element method and numerical computation.Meanwhile, the influence factors on its stress are obtained based upon the stress calculation formula.The comparison of the calculation results with the results of finite element analysis shows that theoretical values correspond well with FEA results.And FEA results can report the fault of release levers.And bending technology, it’s the most important factor affecting stress of the release levers.The establishment of element calculation model can truly reflect a law of forces and stress change of the release levers.Therefore, finite element analysis provides good reference for engineering design and improvement of a release lever.