Based on expression of potential for point charge in anisotropic dielectric and adopting the method of segment calculation superposition，the space potential and electric field strength for uniform charged rectangular frame in anisotropic dielectric are derived. Then，using the relationship between electric field strength and potential gradient，we get the space electric field strength expression for uniform charged rectangular frame in anisotropic dielectric. At last，the special cases of uniform charged square frame and central axis are also discussed simply.