In order to obtain the incoherently coupled screening-photovoltaic soliton families in biased two-photon photovoltaic photorefractive crystals under steady-state conditions,the coupling of multiple mutually incoherent optical beams with the same polarization and wavelength in two-photon photovoltaic photorefractive crystals is theoretically studied.The results show that the screening-photovoltaic soliton families can be considered as the united form of screening soliton families and photovoltaic soliton fam...