Broadband dispersion compensating fiber, preparation method thereof and broadband dispersion compensating module

The invention relates to a broadband dispersion compensation optical fiber, a manufacture method and a broadband dispersion compensation module. The broadband dispersion compensation optical fiber comprises a core layer and a cladding layer surrounding the core layer; the core layer of the optical fiber comprises four concentric sublayers of the fiber core; each sublayer of the fiber core is provided with different relative refractive index and radius; the cladding layer surrounding the core layer is a pure silica glass layer or a quartz glass layer which is partly doped with Freon. The broadband dispersion compensation optical fiber is provided with a dispersion compensation ratio and a higher quality factor, which is helpful for the compensation of link accumulation positive dispersion in the communication system. The invention improves the transmission speed and capacity of dense wave division in the communication system.