A composite bionic surface jet nozzle is mainly composed of a truncated-cone-shaped contraction section and a circular-tube-shaped outlet section, the inner wall of the truncated-cone-shaped contraction section is a composite bionic surface composed of bionic sharkskin resistance reduction surfaces and bionic super-hydrophobic surfaces, the sharkskin resistance reduction surfaces are rectangular protrusions, long edges of the multiple identical rectangular protrusions are adjacent, in addition, the rectangular protrusions are distributed in the circumferential direction of the inner surface ofthe jet nozzle, and discontinuous bionic sharkskin resistance reduction convex rings are formed; the bionic super-hydrophobic surfaces are circular protrusions which are the same as the bionic sharkskin resistance reduction protrusions in height, the multiple circular protrusions which are the same as the bionic sharkskin resistance reduction convex rings in quantity are also distributed in the circumferential direction of the inner surface of the jet nozzle, discontinuous bionic super-hydrophobic convex rings are formed, and the bionic sharkskin resistance reduction convex rings and the bionic super-hydrophobic convex rings are sequentially arranged on the inner surface of the truncated-cone-shaped contraction section of the jet nozzle at intervals. According to the composite bionic surface jet nozzle, liquid resistance during jetting can be effectively reduced, thus, stable liquid jetting is achieved, the jetting distance is increased, and the energy saving effect is achieved.