The invention discloses an acid cylinder for soaking laboratory glass wares. The glass wares need to be soaked into the acid cylinder after an experiment is completed to remove residual substances on the glass wares, if a person is in directly contact with acid liquid in the acid cylinder, the skin is injured, and meanwhile if the glass wares are promiscuously soaked in the acid cylinder, the glass wares are prone to fracture and damage; based on the reasons, the acid cylinder for soaking the laboratory glass wares is designed. The acid cylinder for soaking the laboratory glass wares is mainly composed of a baffle, a connecting rod system, a position clamping device, an outer acid cylinder plate, a liquid discharging pipe, a liquid discharging pipe buckle, an extracting device and an opening sealing plate. The baffle is provided with concave openings, outer rod-opening rings and rod openings; the connecting rod system is composed of an upper buckle, a lower buckle, an inserting hole, a ring hole, an inserting strip, an inner rod, an upper outer rod and a lower outer rod; the positioning clamping device is mainly composed of a first clamping opening, a second clamping opening, a third clamping opening, a clamping position part and a moving rod; sliding grooves are formed in the inner surfaces of the left side and the right side of the outer acid cylinder; the extracting device comprises hook strips and extracting rods, and long-strip plates are arranged on the opening sealing plate. According to the acid cylinder for soaking the laboratory glass wares, under the condition that it is guaranteed that the skin of the human body is not indirectly contact with the acid liquid, and soaking of the glass wares is rapidly and efficiently completed, and meanwhile damage to glass ware is avoided to a certain degree.