The present invention relates to a high barrier multilayer film for functional medical solution product comprising in order, an outer layer comprising polyethyleneterephthalate deposited inorganic oxide thereon; a first adhesive layer comprising ester type polyurethane; a first intermediate layer comprising ethylene vinyl alcohol copolymer; a second adhesive layer comprising ester type polyurethane; a second intermediate layer comprising polyamide; a third adhesive layer comprising ester type polyurethane; and an inner layer comprising propylene-based polymer. The multilayer film has the merits of improved transparency, heat resistance, sealing property, durability, competitive price, oxygen barrier property and less pinhole, so that may be applied to a outer bag of pouch type container of medical solution.