NOVELTY - A residual additive removing method involves washing indium tin oxide piece, mixing with phenyl-C61-butyric acid methyl ester and 1,8- diiodooctane containing dichlorobenzene solution, arranging as active layer material. The washed indium tin oxide piece is coated with poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate using spin coater to remove residual high boiling additives, subjected for evaporating with calcium and aluminum and packaged by removing residual additive of photosensitive active layer of polymer solar energy battery.    USE - Method for removing residual additive from polymer solar energy battery photosensitive active layer.    ADVANTAGE - The method enables removing residual additive with improved photoelectric conversion efficiency.    DETAILED DESCRIPTION - A residual additive removing method involves washing indium tin oxide piece, mixing with phenyl-C61-butyric acid methyl ester and 1,8- diiodooctane containing dichlorobenzene solution, arranging as active layer material. The washed indium tin oxide piece is coated with poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate using spin coater to remove residual high boiling additives, subjected for evaporating with calcium and aluminum and packaged by removing residual additive of photosensitive active layer of polymer solar energy battery, where the washing of indium tin oxide piece is performed by taking 6-9 Omega /cm2 resistance etching pattern complete indium tin oxide piece, washing ultrasonically with aqueous solution containing a surfactant for 2-3 times, distilled water for 2-3 times, acetone for 1-3 times and isopropanol for 1-3 times, drying, cleaning the indium tin oxide piece with water for 2-3 times for 10-12 minutes, the coating of indium tin oxide piece with poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate is performed by heating the piece at 150 degrees C for 12-16 minutes in air, transferring piece with mixed solution and active layer into a vacuum glove box spin-coating, removing residual high-boiling additive is performed after completing spin coating active layer, and removing additive, and evaporating calcium and aluminum is performed by transferring active layer spin-coated indium tin oxide piece to a vacuum vapor deposition apparatus and packaging the photosensitive active to remove residual additive from polymer solar energy battery.