A fluorinated diamine monomer containing pyridine, 6-(4-(4-amino-2-(trifluoromethyl) phenoxy) phenoxy) pyridin-3-amine, was prepared by nucleophilic substitution reaction with 2-chloro-5-nitrobenzotrifluoride and 2-chloro-5-nitropyridine in turn using hydroquinone as raw material and reduction. Four new polyimides (PI) were produced by the conventional two-step method with several dianhydrides. The solubility, thermal stability, mechanical properties, and optical properties of the resulting PIs were characterized. The results showed that the PIs based on 4,4’-oxydiphthalic anhydride (ODPA) and hexafluorodianhydride (6FDA) have outstanding solubility in common organic solvents. In N2 atmosphere, the temperatures of these polyimides with 5% and 10% weight loss are above 548 ℃ and 566 ℃, and the glass transition temperatures are between 226 and 290 ℃, which have excellent thermal stability. These PI films have good optical transparency and mechanical properties with cut-off wavelengths of 382~438 nm, transmittance at 500 nm of 62%~78%, tensile strength of 98.3~110.5 MPa, tensile modulus of 1.86~2.14 GPa, and elongation at break of 9~23 %.