A process for coating the inner part of a woven bag comprises the following steps: first, weaving warps and wefts, which are made of fiber materials on a circular weaving machine, into a tube-shaped fiber weaving layer, then, spraying paint prepared on the spot on the inner side of the weaving layer to form a lining, wherein the paint comprises the following components in part by weight: 26 to 30 parts of ethylene-vinyl acetate copolymer, 56 to 65 parts of polyvinyl alcohol, 16 to 25 parts of isocyanate, 26 to 35 parts of polyether glycol, and 10 to 25 parts of diethyltoluenediamine, and after the lining is dried, obtaining a woven bag product with the spray-coated inner part.