The invention relates to a rolling water-surface oil film sampling device which comprises a roller, blades, a sampling material, a structure bracket, a floater and a pull wire, wherein the roller is in a cylindrical structure, shafts are symmetrically arranged at the axis positions of both ends of the roller and connected with the structure bracket, and the middle part of the outer wall of the roller is provided with the blades; the sampling material is fixed on the outer wall of the roller and distributed on two sides of the blades; the structure bracket comprises a bracket and the floater; both ends of the bracket are axially connected with the shafts at the two ends of the roller, and the floater is arranged on the bracket; and the pill wire is arranged in the direction in which the bracket is orthogonal with the roller shaft is and connected with the bracket. The rolling water-surface oil film sampling device is convenient for on-site operation, can even be used on ships in misty rain and at night, and can also be used for taking water-surface oil film samples which are difficult to take by conventional methods. The device has the advantages of convenient manufacture and low price, and is beneficial to disposable use. The device fills the blank in water-surface bleeding oil quick sampling technology in China and provides a convenient evidence taking means for quick accident investigations, legal proceedings and the like.