The invention discloses a spraying process for an inner wall of an electric hoist winding drum. The spraying process comprises the following steps: removing oil of the inner wall of the electric hoist winding drum, washing, polishing and removing rust, washing, carrying out surface conditioning, carrying out phosphorization operation, washing and airing; then sequentially carrying out primer spraying, floating coat spraying and finishing coat spraying, wherein a putty layer is arranged between two adjacent spraying layers; and scratching a spiral fine line slot on the putty layer. The spraying process is novel in structural design; a traditional layer-layer spraying manner of a primer layer, a floating coat layer and a finishing coat layer is adopted and the spiral fine line slot is scratched on the putty layer; the spiral fine line slot is formed in clockwise, anticlockwise, clockwise and anticlockwise staggered manners and the like, so that the adhesive force of the coat layers is effectively improved and the preservative effect of the coat layers is effectively guaranteed.