By using magnetic stress in place of viscosity as the mechanism for angular momentum transfer, the influence of frozen magnetic field on the structure of a geometrically thin accretion disk is examined in this paper. It is shown that the magnetized disk is quasi-Keplerian and its total luminosity is twice of that in the standard disk model. In the inner region, there exists a narrow cool region and the highly collimated jet is formed under the action of the azimuthal component of magnetic field. Also in this paper, such a possibility is discussed that a magnetized corona may be formed near the...