Super depth digital microscope was employed to observe the macro-/micro-structure of Coleoptera' s elytra .The non-smooth surface textures of elytra have shown superior performance of friction reduction and lubri-cation .Bionic models of regular hexagonal convex texture and circular concave texture inspired by the beetle were established and verified by numerical calculations and simulations .Further tribological experiments were performed and the results show that the circle texture has the lowest coefficient ,which is consistent with the numerical calcu-lations .The research may be further applied to new bionic surface texture designs and also work as a biological template for new bionic inventions .
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