This paper discusses the non-stationary MHD boundary layer on the porous surface. The external magnetic field is homogeneous, perpendicular to the surface and stationary with respect to it. The electro-conductivity of the fluid is the function of the velocities ratio. The problem is in the plane. The described problem equation is reduced to the universal equation by using three infinite sets of parameters and one constant parameter. For different functions of the electro-conductivity change the universal equations are given. A part of the obtained results is presented graphically in the paper.