Miniature axial-flow blood pump with unequal-length splitter blade structure

The invention discloses a miniature axial-flow blood pump with an unequal-length splitter blade structure. The miniature axial-flow blood pump comprises a pump shell, a front guide vane (2), an impeller (5) and a rear guide vane (8), the impeller (5) is provided with two long blades (11), and at least one long splitter blade (12) and at least one short splitter blade (13) are arranged between the two long blades (11). An axial length ratio K1 of each long splitter blade (12) to each long blade (11) is equal to 0.55-0.65, and an axial length ratio K2 of each short splitter blade (13) to each long blade (11) is equal to 0.30-0.40. Each long splitter blade (12) and each short splitter blade (13) are arranged between the long blades (11) and deflect by 4-6 degrees towards the back side of the long blades (11). The miniature axial-flow blood pump with the unequal-length splitter blade structure is not only capable of guaranteeing low blood damages but also capable of providing sufficient blood pump flow volume and pressure under a small enough implantation size.