Perovskite quantum dots have attracted great attention due to their narrow emission spectrum, tunable spectrum and high quantum yield, however, their poor stability because of the sensitivity of water and oxygen molecules limits their application. Polymethyl methacrylate (PMMA) and polystyrene-polyethylene-polybutene-polystyrene block copolymer (SEBS) were selected as two kinds of polymer materials to study their perovskite quantum dots film performances. The high-quality perovskite quantum dots films were fabricated by one-step package method. The decay rate of PMMA perovskite films was about 4 times and 6 times that of SEBS films under continuous 365 nm UV excitation and LED remote package, which indicated SEBS perovskite films had better stability than PMMA. Furthermore, the stability of SEBS perovskite films in air and water was studied. Compared with the 18% recession after about 4 h of the perovskite quantum dots solution, it was found that SEBS perovskite films in the air and water about 18% degradation extended to 55 h and 240 h, indicating that SEBS package enhanced the stability of the perovskite quantum dots, which has great significance to the application of perovskite quantum dot package in the future.