The invention discloses a crucible and a preparation device and method for special dispersion glass. The crucible comprises a crucible body and a crucible cover. The crucible body is provided with a first annular groove for containing a liquid sealing solution. The crucible cover is provided with a first annular stop piece matched with the first annular groove. The crucible cover and the crucible body are sealed in the mode that the first annular stop piece is inserted into the first annular groove containing the liquid sealing solution. A charging opening is formed in the crucible cover and used for charging and gas introduction. A second annular groove for containing the liquid sealing solution is formed in the portion, around the charging opening, of the crucible cover. An exhaust opening is formed in the crucible cover and used for exhausting gas. A third annular groove for containing the liquid sealing solution is formed in the portion, around the exhaust opening, of the crucible cover. A stirring opening is formed in the crucible cover. A fourth annular groove for containing the liquid sealing solution is formed in the portion, around the stirring opening, of the crucible cover. A material leakage pipe is arranged at the bottom of the crucible body. The special dispersion glass prepared through the crucible has the higher optical uniformity and batch consistency.