本文用统计力学的方法处理吸附在固体基质表面上的玻色子薄膜系统，证明对弱相互作用基质，未饱和蒸汽压ｐ与相变温度Ｔ的关系与基质种类无关。同时证明相变温度Ｔ与薄膜厚度α的关系与基质有关。所得结论与液氦薄膜超流动性的实验结果相符合。 In this paper, the statistical mechanics of boson film system adsorbed on the surface of solid matrix is ​​used to prove that the relationship between the unsaturated vapor pressure p and the phase transition temperature T has nothing to do with the type of matrix for the weakly interacting matrix. At the same time, it is proved that the relationship between the phase transition temperature T and the film thickness α is related to the matrix. The conclusion is in good agreement with the experimental results of the superfluidity of the liquid helium film.