A stretched-pulse mode-locked fiber laser which can generate giant-chirp is reported. The nonlinear polarization (NPR) is applied to start the mode-locking. The laser consists of long single mode fiber (SMF) providing large normal dispersion, and grating pairs are utilized for compensation. The mode-locking laser operates at the normal-dispersion region, generates giant-chirp pulses of 2.17 ps and pulse energy of 1.81 nJ at a repetition rate of 36.96 MHz. The giant-chirp pulses are dechirped to a pulse duration of 70 fs. A more than 80 dB signal-to-noise ratio (SNR) for fundamental harmonic of the pulse train is observed in radio frequency analyzer. This kind of giant-linear chirp mode-locking laser is very suitable for chirp pulse amplification (CPA) system.