The environmental factors, such as light radiation, water vapor, and oxygen, induce the degradation of two-dimensional perovskites, and therefore its stability greatly limits the further development and marketization of this material. Taking advantage of the strong stability and hydrophobicity of fluoride, fluorophenylethylamine was introduced into the organic layer of two-dimensional perovskites, which could effectively improve the stability of two-dimensional perovskites, but the fluorescence efficiency was partly reduced. To solve this problem, polystyrene (PS), polymethylmethacrylate (PMMA) and cycloolefin polymer (COP) were employed to encapsulate the two-dimensional perovskite film. The photoluminescence intensity was improved by 2.2, 1.3 and 1.4 times, respectively. The light stability was improved by 3.3, 3.1 and 3.9 times, respectively. Furthermore the humidity stability was also verified. This study provides a new idea for the development of two-dimensional perovskite films in optoelectronic devices.