The carboxylic fluorocarbon copolymer dodecafluoroheptyl methacrylate-co-methacrylic acid ( DHFMA-co-MAA) which MAA content was different were synthesized using the dodecafluoroheptyl methacrylate( DHFMA) and methacrylic acid ( MAA) as monomer and butanone as solvent by solution polymerization. Carboxylic fluorocarbon copolymer fiber film was prepared by electrospinning experiments. The effect of different MAA content and spinning solvent on morphology of fiber film were studied, and the property of anti-light degradation of fiber film was investigated. The results show that DHFMA-co-MAA which contain 25 % MAA using butanone as solvent and DHFMA-co-MAA which contain 10 % MAA using mix solvent butanone and DMF( mass ratio2 : 8 ) can both produce fiber film which have smooth surface, small fiber diameter and uniform morphology. UV degradation experiments indicate the stability of 10 % MAA content fiber film is better, and is more suitable using as catalyst carrier.