Abstract: Taking the camshaft bearings of a certain type of marine high-speed diesel engine as the research object, an integrated model for analyzing the lubrication and excitation force characteristics of the camshaft bearings was established. This was achieved by independently developing a simulation program in MATLAB software based on classical theoretical equations such as the Reynolds equation. For verification, a physically equivalent simulation model was constructed using AVL Excite software. The oil film bearing capacity of each bearing, the minimum oil film thickness of the bearings, and the contact dynamics characteristics of the cam-follower pair were investigated. Results indicated that the self-developed integrated model exhibits a highly consistent prediction of the minimum oil film thickness with the AVL Excite results. The prediction error for periodic average load capacity ranges from 0.34% to 13.93%, and the overall trends are in good agreement. The load distribution exhibits a distinct hierarchical characteristic. The end bearings （#1 and #9） bear lower oil film bearing capacity with relatively small fluctuations in their curves. In contrast, the bearings (#3, #4 and #8) experience highly concentrated loads （mean>3 070 N） with significant fluctuations. Due to the superimposed reverse torques at the middle of the shaft system, bearing #5 demonstrates a unique “flat-top” load characteristic. The oil film thickness correlates strongly with the load. The end bearings have a thicker and more stable oil film, while the oil film of bearing #8 is compressed to the micron level （with an average of approximately 0.004 mm）, indicating a severe lubrication condition. Meanwhile, bearing #5 is subjected to the superimposed effects of reverse torques from adjacent cams on both sides, resulting in extremely poor lubrication conditions.