Abstract: In order to apply internal glue-line periodically for combined filter rod maker, a glue application system was designed on the basis of high speed solenoid valve technology. With an electromagnetic gluing gun, the system precisely controlled the gluing position, the number, space and size of glue spots in filter rod via regulating glue pressure and gluing gun parameters with an electrical control system. Furthermore, the system could be rapidly adjusted to adapt to combine filter rods of different specifications. Taking a KDF2 filter rod maker as an object, the system was tested, the results showed that it ran stably at the production speed of 200 m/min; no glue spot or glue residue was found at the cavity portion of dual or triple filter rod; and no missing or excess glue spots in the gluing area of filter rod; and the position deviation of glue spots was controlled within 2 mm. This technology provides a support for the production and application of combined filter rods with diversified structure.