In order to design high quality single pass-band wavelength channels, three types of micro-resonator photonic crystal waveguides with gradually varied formations are designed. Power transmission spectra of these waveguides are studied by using FDTD (Finite-Difference Time-Domain) method. The output performances of these structures are compared and analyzed by collecting the pass-bands parameters of power spectra. As the central rod radius value of the micro-resonator increases, single pass-band transmission patterns of every waveguide output show the law of three times regular periodic variations from the short wavelength to the long wavelength. Optimization of structural choices and structural parameter designs have favourable effects on the output performances, so all of these waveguides have promising potentials to develop more single pass-band wavelength channels. The results show that the optimized structures can possess high quality of single pass-band wavelength transmission characteristics, such as regular periodic variation patterns, favorable signal enhancement designs, stable transmission performances, excellent adaptability of broad bandwidth. The best type of the structural designs can be flexibly selected according to the required wavelength, and these waveguides have application values in the designs of dense optical communication system, integrated optical path, compact optical sensing interface etc.