本文应用Rosen的双度规引力理论的引力场方程于球对称星的情形,假设球对称星中心处引力为零,在这一假设下解了Rosen方程,得出星体的内外度规无奇性,因之引力红移无上限。所以类星体的非常大的红移量可以看为是引力红移。提供了另一个对Rosen理论的判据方法。 In this paper, we use Rosen’s theory of gravitational field in the theory of double-degree gravitation for spherical symmetry stars. Suppose the gravitational force at the center of the spherical symmetry is zero. Under this assumption, we solve the Rosen equation and get the singularity , Due to gravity redshifts no limit. So a very large quasar redshift can be seen as a gravitational redshift. Provides another criterion for Rosen’s theory.