A method for coating the solid dispersion with film is provided to maintain improved elution rate even though the solid dispersion containing cilnidipine is coated by an aquatic film and prevent quality of surface state of the solid dispersion from being deteriorated by controlling temperature during coating process using an aquatic film coating solution. The solid dispersion is coated with film by performing a coating process using the aqueous film coating solution in a coating device at exhaust temperature of 30-60 deg.C, preferably 32-55 deg.C, wherein the solid dispersion contains cilnidipine, and has a tablet shape and secant lines； and the aqueous coating solution contains water or water and water-soluble organic solvent.본 발명은 수계 필름 코팅액에 의한 고체 분산체의 우수한 코팅방법을 제공한다. 고체 분산체의 필름 코팅을, 코팅액으로서 수계 코팅액을 사용하고, 코팅 장치의 배기 온도가 30℃보다 높고 60℃보다 낮아지는 온도 관리하에서 실시함을 포함하는, 필름 코팅방법이 제공된다.
