Steering oil pump with low noise and low pulsation

The invention discloses a steering oil pump with low noise and low pulsation. The steering oil pump comprises a pump body provided with a compression chamber, a pump shaft mounted on the pump body, a stator, a rotor and a blade, wherein the stator, the rotor and the blade are arranged in the compression chamber; the pump shaft is connected with the rotor through a spline and drives the rotor to rotate in the stator; the rotor is provided with a plurality of rotor grooves in the circumferential direction; the blade is mounted in the plurality of rotor grooves and rotates along with the rotor; the quantity of the rotor grooves is 12; an interval angle is formed between the two adjacent rotor grooves; two equally-divided semicircles of the rotor sequentially are a first interval angle, a second interval angle, a third interval angle, a fourth interval angle and a fifth interval angle in the clockwise direction of the rotor; the angle of the second interval angle is less than the first interval angle and the thir