The utility model relates to an inclined shaft oil -well pump can be used to big inclination pumpingh well, prevents the oil pump plunger abrasion. This oil -well pump includes valve cover top connection and valve cover lower clutch, the valve cover top connection is equipped with the oil outlet, the valve cover lower clutch is the ladder excircle, the upper portion excircle is gone up connector thread with valve cover and is connected, its middle part body is equipped with to pass presses the hole, circle and valve cover threaded connection in the lower part, seal assembly is equipped with inthe annular space of formation between the middle part of valve cover lower clutch body and pump barrel, this seal assembly presses the hole corresponding with the biography, its sealing performancehas effectively been improved, the fragmentary clearance fit of seal assembly with the pump barrel has been realized. Its wearing and tearing are slow, and the packing element has automatic compensation's characteristics, consequently compare long service life with conventional oil -well pump. This oil -well pump has the wear -resisting function of sand control. Closely seal, the zero clearance, the greatly reduced sand grain gets into the chance in plunger upper portion clearance, avoids sand card, sanding.