The invention discloses a polishing device for a metal tube for an optical communication device.The polishing device comprises a lower base where the metal tube is installed and an upper base where a honing strip is fixed.The lower base comprises a columnar body, a counter bore is formed in the upper end face of the body, a vertical connecting tube is formed on the bottom face of the counter bore, a first handle is arranged on the lower end face of the body, a slot is formed in the outer wall of the body, a limiting block is inserted into the slot, a boss is formed on the outer wall of the body and internally provided with a groove hole, a honing block is inserted into the groove hole, and an adjustment bolt abuts against the honing block and is connected to the boss in a threaded mode.The upper base comprises a circular disc, a plurality of notches are formed in the outer wall of the lower end of the disc, honing strips are inserted into the notches of the disc and fixed to the disc through jack screws, the lower ends of the honing strips are exposed out of the lower end face of the disc, a vertical supporting column is formed on the lower end face of the disc and inserted into the connecting tube of the lower base, and a second handle is formed on the upper end face of the disc.