The finite difference method was adopted to solve Reynolds equation based on the JFO(JakobssonFlobergOlsson) boundary condition,the oil film pressure distribution of the connecting rod bushing was obtained,and the analytical expressions of the hydrodynamic force,discharge capacity were derived.A model of the oil film pressure distribution of the connecting rod bushing was developed under starved lubrication,and the effects of load on the static equilibrium position,the maximum oil film pressure and the minimum oil film thickness of the connecting rod bushing were analyzed.The results show that the lubricating characteristics of the connecting rod bushing have the same change rule under different crankshaft speed.The end discharge of oil film near the top dead center of the diesel working stroke is larger than oil supply,which may lead to the formation of oilfilm boundary friction,even dry friction or wear.The optimal relative gap is 0.025% to 0.05 % between connecting rod bushing and piston pin.