The invention provides a slipper pair eccentric-wear wearing model based on a non-uniform gap oil film, and relates to the field of axial-piston-pump slipper pair friction lubrication. According to the model, eccentric-wear characteristics of a slipper and non-uniformity distribution of the lubrication oil film are considered on the basis of an abrasive wearing model based on two-dimensional parallel planes; an idea of discrete solving on the eccentric-wear lubrication oil film of a slipper pair is adopted, the oil film of the non-uniform distribution is divided into multiple small oil film intervals of which distribution can be approximated as parallel distribution, individual solving of the amount of parallel wearing is carried out on each interval, and then a double-integral idea is adopted to carry out extension to an entire slipper bottom surface to obtain the amount of total wearing by solving; and finally, curvilinear integral is carried out along an elliptical motion trajectoryof the slipper on a swashplate surface to obtain the amount of eccentric-wear wearing of the slipper pair in a unit cycle by solving, and the mounts of eccentric-wear wearing of the piston-pump slipper pair under different working conditions are obtained at the same time through fully digital simulation calculation. Results show that for a piston pump working under working conditions of high speed/low pressure/small displacement for a long period, the amount of wearing of the slipper pair can be decreased, and service life of the pump can be improved.