The invention discloses a cell box conveying device of a cell box coating machine. The cell box conveying device comprises a cell box conveying mechanism, a cell box coating platform and a cell box transfer mechanism, wherein the cell box conveying mechanism conveys a cell box through a cell box conveying belt; the cell box transfer mechanism transfers the cell box on the cell box conveying belt onto the cell box coating platform; the cell box coating platform comprises a horizontal platform plate; limit convex strips are arranged in parallel on the left side and the right side of the platform plate. The cell box conveying device of the cell box coating machine, provided by the invention, is simple in structure, reliable in operation and relatively low in cost.