A novel double-wavelength single-beam two-photon bit-by-bit recording scheme that employs a special optical wavelength-division aperture in its beam focusing system is proposed. The simulation results show that, by properly selecting the configuration of a wavelength-division aperture and the power ratio of the two laser beams, our new scheme can achieve a much smaller recorded bit than a conventional single-beam two-photon recording scheme, especially in the longitudinal direction. It means that our new approach improves the two-photon recorded data density on a large scale.