The invention relates to the technical field of a solar cell, and particularly to a preparation process of a solar cell packaging board. The preparation process comprises the steps of supplying a substrate layer which has a first surface and a second surface that are oppositely arranged; applying a first coating on the first surface; applying a third coating on the second surface; forming a barrier layer on the surface, which is far from the first surface, of the first coating through a film coating process; applying a packaging layer on one layer, which is far from the first coating, of the barrier layer; and applying a second coating on one layer, which is far from the barrier layer, of the packaging layer, wherein the second coating is a wearing-resistant coating. The preparation process according to the invention saves time and realizes high flexibility. The solar cell packaging board formed through the preparation process has advantages of high steam blocking performance, high anti-dazzle performance, high wearing resistance, high scratch resistance, low weight, small thickness, high flexibility, higher light transmittance, simple structure, low cost and high product yield. Furthermore a requirement for a use time limit of the solar cell can be satisfied.