Heart blood pump

The utility model provides a heart blood pump which comprises a pump portion and a motor portion, the pump portion is used for stretching into a human body, the pump portion comprises a pumping and discharging pipe, an impeller and a first supporting piece, the impeller and the first supporting piece are arranged in the pumping and discharging pipe at intervals, an inlet and an outlet are formed in the pumping and discharging pipe, and the impeller is located at the near end of the pumping and discharging pipe. The first supporting piece is located on the near end side of the impeller. The motor part comprises a conveying guide pipe and a motor arranged in the conveying guide pipe, and the conveying guide pipe is fixedly connected with the pumping and discharging pipe; an output shaft of the motor penetrates through the first supporting piece through a flexible transmission wire to be fixedly connected with the impeller. During working, the motor drives the impeller to rotate through the flexible transmission