A coupled bionic optimization-based vane pump impeller, comprising a front cover plate (1), a rear cover plate (3), and a blade (4), wherein a plurality of mutually parallel V-shaped grooves (5, 6) are disposed on a working surface and a back surface of the blade (4) located at an impeller exit; the V-shaped grooves (5, 6) extend from a blade exit (2) edge to a blade inlet edge; the front cover plate (1) and the rear cover plate (3) are each provided with an array of oval dimples; each column of dimples is uniformly arranged along the blade streamline direction, and each row of dimples is uniformly arranged along the circumferential direction using a center line of the impeller as the center. The V-shaped groove group is opened on the working surface and the back surface of the blade for bionic optimization, and the array of oval dimples is disposed on opposite wall surfaces of the front cover plate (1) and the rear cover plate (3) for bionic optimization, thereby effectively reducing the resistance of the blade surface and improving the resistance reduction effect of the pump.
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