The invention belongs to the technical field of disinfectants and particularly relates to a compound glutaraldehyde decamethylammonium bromide long-acting disinfectant. Based on volume part, each 100parts of the disinfectant contains the following components: 6-12 parts of glutaraldehyde, 1-2 parts of decamethylammonium bromide, 1-2 parts of an odor removal agent, 1-2 parts of an adhesive and thebalance of water. According to the disinfectant, the special odor removal agent is capable of effectively removing indoor harmful and pungent odors; the adhesive has a strong adhesion force, so thatthe effective disinfection time is greatly prolonged; and the compatibility of the raw materials in a formula is reasonable, so that the disinfectant has relatively low pungent odor, relatively long effective disinfection time and very high popularization and application values.