The plastic rod of the iodophor cotton swab is a tube filled with iodophor. The effective iodine content of iodophor cotton swabs should not be less than 0.765mg/piece. When using iodophor cotton swabs, atmospheric pressure and gravity are utilized. When using, the colored ring end of the iodophor cotton swab is broken, and the iodophor can be pressed into the other end by atmospheric pressure and gravity, and then it can be used. Iodophor cotton swabs are named after their presence of iodophor components. They have strong antivirus and sterilization properties, and can effectively kill viruses and bacteria, ensuring safety and hygiene. Therefore, the iodophor cotton swab filling machine needs to inject iodophor into a plastic rod. The diameter of the plastic rod is relatively small, making it very difficult. The working principle of the iodophor cotton swab filling machine is that the iodophor cotton swab filling machine is a semi-automatic piston type filling machine. By driving a piston through a cylinder to extract and extract materials, a one-way valve is used to control the flow direction of the material, and a magnetic spring switch is used to control the stroke of the cylinder to adjust the filling amount, and the air from the plastic rod needs to be discharged.