Abstract: Because the marine environment is changeable, the marine diesel engine works in the environment of high humidity and high salinity for a long time, which causes the friction and wear of the pin sleeve in the engine chain to be very serious, which affects the overall safety of the ship. Literature shows that the surface texture technology can improve the tribological properties of parts surface. Based on this, nanosecond pulsed laser was used to carry out surface texture ablation experiment of chain pin of naval diesel engine to explore its laser processing technology. A single factor experiment was designed to investigate the effects of pulse number and repetition frequency on the groove texture morphology parameters, and the effects of average power, scanning speed, scanning number and repetition frequency on the groove texture morphology parameters.The experimental results show that the texture quality of pits is the highest when the pulse number is 5000 and the repetition frequency is 2000 kHz. Scanning speed and repetition frequency have the greatest influence on the groove texture parameters. When the average power is 50 W, the scanning speed is 150 mm/s, the scanning times are 150 times and the frequency is 2000 kHz, the groove texture quality is the highest.