Based on the theory of multibody dynamics,by considering the factors affecting the elastohydrodynamic lubrication of journal bearing,the simulation calculation model of connecting rod bearings was built,and the lubrication status of the connecting rod bearings of the two stroke marine diesel engine under rated working condition was analyzed by using finite element method.The results of one working cycle show that the small end bearing is always subjected to compression,the big end bearing is in tension in a short time,and the vertical load direction changes.The maximum value of the load of the connecting rod bearing appears at the time of maximum pressure in the cylinder.The orbit path of the small end bearing is always located in the smaller range of the lower half area,and the high oil pressure area is relatively concentrated.The orbit path of the big end bearing exists mainly in the upper right part of the shell.The distribution of the average oil film pressure of the two bearings is more concentrated.The minimum oil film thickness of the two bearings under the rated condition is above 3 μm,which can meet the requirements of hydrodynamic lubrication.