获得了有偏压的光伏光折变晶体中空间孤子传播的非线性波动方程 .它是屏蔽孤子和短路光伏孤子的非线性波动方程的统一形式 .在低振幅区域 ,由它得到了起源于对外电场的非均匀空间屏蔽和光伏效应的空间孤子 .在适当的条件下 ,这类孤子可以转化为屏蔽孤子和短路光伏孤子 .当外电场为某一值时 ,用改变外电场的极性和旋转光的偏振方向可以实现这类孤子的明暗转换 The nonlinear wave equation of spatial soliton propagation in photovoltaic photorefractive crystal with bias voltage is obtained, which is the uniform form of the nonlinear wave equation of soliton and short-circuited photovoltaic soliton. In the low amplitude region, Under the appropriate conditions, these solitons can be converted into shield solitons and short-circuit photovoltaic solitons. When the external electric field is a certain value, the external electric field is changed by changing the polarity and rotation of the external electric field The polarization direction of light can achieve the light and shade conversion of such solitons