The model of the vertical-cavity surface-emitting laser (VCSEL) is established using SIMULINK and the nonlinear behaviors of VCSEL with multiple external optical feedbacks are studied using this model. For short external cavities, the photon density shows periodic cosine undulation along the external cavity length whose period is equal to half of the lasing wavelength; for relatively long external cavities, VCSEL undergoes the regions of chaos, multiple, double and single period orderly with increasing the length of the external cavity, however, these regions emerge contrarily with increasing the external cavity′s reflectivity. If only the first feedback is taken into account, the nonlinearity is weaker than the multiple feedbacks case due to neglecting the high-order feedbacks that own a lot of energy. It is also shown that the nonlinear behaviors can be constrained by increasing the spontaneous emission factor or decreasing the linewidth broadening factor.