We propose a novel design for photonic crystal fiber, which has flattened-dispersion, high nonlinear coefficient and low
confinement loss for supercontinuum generation. The proposed fiber needs appropriate number of design parameters.
Results show that eight-ringed photonic crystal fiber is obtained with nonlinear coefficient greater than 33W<sup>-1</sup> km<sup>-1</sup>, and
small dispersion slope 2.00×10<sup>-3</sup>ps/nm<sup>2</sup>/km in the telecommunication window. Ultra flattened dispersion of -1.65~ 0.00
ps/nm/km and confinement loss in super low order of 10<sup>-4</sup>dB/km are simultaneously obtained ranging from 1.45μm to
1.65μm. It's shown that through numerical analysis the novel micro-structured optical fiber with small normal
group-velocity dispersion and nearly zero dispersion slope offers the possibility of efficient supercontinuum generation
in the telecommunication window using a few ps pulse. supercontinuum with 70nm-bandwidth at 1550nm is achieved
through only 150m-long fiber.