NOVELTY - A crosslinking agent (in parts weight) (7-10), ultraviolet light absorbent (6-10), ultraviolet light stabilizing agent (5-8), rare-earth light conversion agent (6.5-10), 3,5-di-tert-butyl-4-hydroxytoluene (7-10), plasticizer (5.5-10), ethylene-vinyl acetate copolymer (18-25) and low-density polyethylene (4-9) are uniformly-stirred. The obtained mixture is supplied to three-layer co-extrusion film blowing machine and extruded to obtain molded material. The molten mass in three-layer co-extrusion blowing machine is cooled to form adhesive packaging film.    USE - Preparation of packaging film used for solar battery.    ADVANTAGE - The method provides solar battery having excellent durability and photoelectric conversion efficiency.    DETAILED DESCRIPTION - A crosslinking agent (in parts weight) (7-10), ultraviolet light absorbent (6-10), ultraviolet light stabilizing agent (5-8), rare-earth light conversion agent (6.5-10), 3,5-di-tert-butyl-4-hydroxytoluene (7-10) as antioxidant, plasticizer (5.5-10), ethylene-vinyl acetate copolymer (18-25) and low-density polyethylene (4-9) are uniformly-stirred for 25-35 minutes and with stirring speed of 8-l00 rpm. The obtained mixture is supplied to three-layer co-extrusion film blowing machine and extruded for 0.2-0.3 MPa to obtain molded material. The three-layer co-extrusion film blowing machine has 6 areas comprising area (a1) having molten mass with temperature of 160-165 degrees C, area (a2) with temperature of 165-170 degrees C, area (a3) with temperature of 175-180 degrees C, area (a4) with temperature of 180-185 degrees C, area (a5) with temperature of 185-190 degrees C and area (a6) with temperature of 190-195 degrees C. The molded material is wind-cooled to 15-21 degrees C for 30-40 minutes, and the wind speed is 10-13 m/second. The molten mass in three-layer co-extrusion blowing machine is cooled to form adhesive packaging film. The adhesive packaging film is cut to needed size using dividing and cutting machine.