Abstract: The oil leakage of traditional oil-lubricated bearing of ship stern shaft causing serious marine pollution and are gradually replaced by water-lubricated bearing. However, due to the poor load-bearing capacity, tribology performance of water-lubricated bearing should be improved. The synergetic effect of PA66 lubricating filler and surface texture on the friction and wear properties of water-lubricated bearing prepared by HDPE/PA66 composite was studied. The surface texture of the composite sample after immersion was observed by using the ultra-deep 3D microscopy. The specimen was tested using the CBZ-1 tester and the friction coefficient was recorded. The surface profiler and scanning electrical microscopy were used to observe and analyze the wear mechanism after the test. The results show that the tribological properties of the composite were enhanced by adding PA66. The dilation property in water of PA66 enabled the bulge texture on surface of HDPE/PA66 polyblends, which reduced friction coefficient and wear. The presence of PA66 in the polyblends rendered a transfer film on the surface of the copper disc during the friction process, which effectively protected the surface of the friction pair and reduce wear. The polyblend of HDPE-30% PA66 had the lowest friction coefficient and low wear. The polyblend of HDPE-20% PA66 can be candidate material for practical engineering application because of its low friction coefficient, good wear property and dimensional stability.