Cylinder of fire extinguisher with anti-corrosion inner casing

The utility model relates to the cylinder body of a fire extinguisher with an anti-corrosion inner sleeve, comprising a fire extinguisher cylinder body and an anti-corrosion inner sleeve which is provided with one layer of acid and alkaline resistance polyester material which is formed by blowing molding on the inner wall of the fire extinguisher tube body. The acid and alkaline resistance polyester material can be PET. The utility model can lead fire extinction medicament which is stored in the cylinder body and the inner wall of the cylinder body to be completely isolated. So the anti-corrosion effect can be improved, the strength of the cylinder body can be enhanced, and the service life of the cylinder body can be extended. In addition, the utility model also has the advantages of convenient getting material, simple fabrication, and no pollution.