Polishing device and polishing method for porous microstructure optical fiber preform

The invention discloses a polishing device for a porous microstructure optical fiber preform, which comprises a polishing chamber, the polishing chamber comprises a liquid inlet box and a liquid outlet box positioned below the liquid inlet box, the liquid inlet box is provided with a liquid inlet cavity with an opening at one end, the liquid outlet box is provided with a liquid outlet cavity with an opening at one end, and the opening on the liquid inlet cavity is opposite to the opening on the liquid outlet cavity; the polishing liquid supply unit is communicated with the liquid inlet box; the liquid inlet control unit is used for connection and disconnection between the polishing solution supply unit and the liquid inlet box, the invention further discloses a method for polishing by using the polishing device, a chemical polishing method is utilized, under the condition of certain concentration, the reaction time is accurately controlled through the polishing device, the polishing solution is not recycled,