在线缺陷光子晶体波导中，利用矩形孔和椭圆孔分别替代临近线缺陷的第二行和第一、三行圆形孔，构成矩形孔光子晶体波导结构.利用平面波展开法对波导的慢光特性进行仿真分析，研究矩形孔的非对称性对慢光带宽和色散特性的影响.研究表明，在慢光区域平均群折射率变化为±10%的情况下，与圆形孔线缺陷波导相比，得到的导模能更好地限制在禁带中，而且当矩形孔宽度参量小于高度参量时，导模可以得到归一化延迟带宽积更大、带宽更宽、色散更小的慢光.通过对波导中矩形孔参量的优化，得到的慢光归一化延迟带宽积最大为0.402，此时带宽为44.4 nm，群速度色散为8.0 ps2/mm.

Rectangular holes photonic crystal waveguide was proposed, by introducing rectangular holes in the second row and ellipse holes in the first and third rows near the linedefect waveguide to replace circle holes. The characteristics of slow light were investigated by plane wave expansion method. Influence of the structure asymmetry of rectangular holes to slow light bandwidth and low dispersion property were studied. Results show that within the linear region of guided mode that average group index varies at a variation of ±10% range, compared to circular holes linedefect waveguide, the obtained guided mode can be better restricted in band gap, when width parameter of rectangular holes is smaller than height parameter, guided mode can obtain slow light with bigger normalized delaybandwidth product, wider bandwidth and lower dispersion. Optimization to parameters of rectangular holes in the waveguide shows the biggest normalized delaybandwidth product about 0.402, with bandwidth about 44.4 nm and group velocity dispersion about 8.0 ps2/mm, it indicates that the waveguide has a promising application in the field of data transmission without distortion.