The experiment data about 0.95μm wavelength high energy lumionous peak in 1.55μm InGaAsp/InP laser are analyzed.The results prove that the Auger compound of InGaAsP active region is the major cause of carrier leakage toward the two sides of InP restricted layer.It is also the main factor of the low T0 of1.55μm InGaAsp/InP DH Laser.