In order to obtain the effect of system parameter change of the intensity profile of two-photon incoherently coupled spatial soliton pairs, the incoherently coupled equations of bright-dark screening-photovoltaic spatial soliton pairs are numerically solved. The effect of gating beam, partial pressure coefficient and temperature on the intensity profile for soliton pairs are analyzed theoretically. The width of soliton-pairs-intensity-profile increases with gating beam intensity greatening and it decreases with partial pressure coefficient greatening. When the temperature of crystals increases, the width of profile increases but the maximum intensity of soliton pairs decreases. It is opposite when the temperature decreases. The results are benefit for the project practice of two-photon incoherently coupled spatial soliton pairs.