The invention discloses a non-standard angular contact ball bearing comprising an outer ring, an inner ring, a cage and steel balls. A channel is arranged between the outer ring and the inner ring, and internally provided with the cage and steel ball components; the width of the outer ring is 21.3-21.7 mm, and the width of the inner ring is 7.63-7.69 mm; 24 pockets are distributed on the cage annularly and uniformly, and each pocket is internally provided with one steel ball; and the diameter of the steel ball is 4.8 mm; and the contact angle of the bearing is 45 DEG. The non-standard angularcontact ball bearing has the beneficial effects that the coaxiality of the outer ring and the inner ring of the non-standard bearing is high though rational parameter structure design, and the ball bearing does not beat, and can bear high axial load; the ball bearing is high in reliability and long in durability; and the operation requirements of a farm cultivator under the conditions of complex environment and variable loads are met.