With typeⅡphase matching, a detailed description of second-harmonic generation (SHG) for ultrabroad-band pulse was presented. The phase errors induced by noncollinear phase matching, phase mismatch and group-velocity mismatch for ultrabroad-band pulse were analyzed. The results show that it is necessary to multiply a modulation function for the recorded interferometric intensity to avoid the effect of pulses bandwidth. The phase error generated by bandwidth is proportional to the nonlinear crystal length and the beams intersect angle. The phase error generated by phase mismatch and group-velocity mismatch is relatively large with type Ⅱ phase matching. The intensity and phase errors in the reconstructed pulses should be compensated.