The invention discloses a combing sawtooth cylinder with an auxiliary tooth structure. Combing quality is increased, and simultaneously needle tooth fracture, applique and fiber damages are avoided. The cylinder comprises a circular comb component. The circular comb component is provided with several needle strips. Each needle strip is provided with several rows of needle teeth. Each row of needleteeth comprises a plurality of single teeth. The needle strips are provided with auxiliary teeth. In the invention, based on the condition that a needle tooth base thickness and a tooth gap are not reduced, cylinder tooth density and spinning quality are increased, needle tooth intensity is guaranteed, and the needle tooth fracture, the applique and the fiber damages are avoided.