Transmission rocker arm for backhoe loader is one of the key parts to transmitting load to realize load and unload and transportation.At the same time it is a easy to damage part in the operation of backhoe loader.The analysis of structural and bearing load characteristic of transmission rocker arm of backhoe loader is carried out fully according to its crack feedback

and its loads and work conditions in operation are summarized.The reason of crack is gotten by ANSYS analysis and an improvement design is put forward.The structure strength of improvement transmission rocker arm is improved by 29% than before.And the improved rocker arm is used abroadly without crack feedback.It can be seen that the improvement design is scientic and right.