Compensation and correction of spectrum of picosecond chirped super-Gaussian pulses generated by semiconductor lasers using a dispersion-shifted fiber (DSF) were achieved. Appropriate spectral compression can reduce inter-symbol interference and prevent the signal distortion induced by excessive spectral stretching, thus facilitating steady propagation of super-Gaussian pulses to a certain extent and increasing propagation distance of optical fiber system. The spectral evolution of the super-Gaussian pulse was simulated numerically by symmetrical split-step Fourier method (SSFM) with initial chip of －3, pulse width of 10 ps and peak power of 30 W in the DSF. The results show that the DSF with length of 0.5 m can greatly eliminate “red shift” chirps of the initial pulse.