A design scheme of dispersion managed soliton fiber lasers with 100 MHz repetition frequency suitable for constructing the optical frequency comb applied in precision spectroscopy is presented based on common commercial optical fibers. By adjusting the repetition frequency with low negative dispersion fibers and increasing the respiration ratio of the intra-cavity pulse with high positive dispersion fibers, a dispersion managed soliton fiber laser with repetition frequency of 108 MHz and center wavelength of 1550 nm based on positive dispersion erbium-doped fiber is built. The intra-cavity net dispersion of the laser is －0.0023 ps2. The direct output pulse width is 70 fs. The pulse width is 48 fs after fiber compression, and the pulse center wavelength is 1550 nm.