Understanding the point spread function (PSF) in scattering media is crucial in various fields such as biomedical imaging, atmospheric science, and optical communication. This study delves into the characteristics of PSF and elucidates the relationship between PSF and different wavelengths in scattering media through theoretical derivation and experimental verification of the light field function. The correlation of PSF at different wavelengths is mainly controlled by the scaling factor and the equivalent phase mask. By analyzing and predicting the equivalent phase mask, this article proposes a weighted average algorithm that successfully estimates PSF under unknown wavelength conditions, thereby improving the quality of image reconstruction compared to traditional algorithms. This work reveals the relationship between PSF and wavelength, providing valuable insights into optimizing imaging quality in scattering environments and analysis of spectral signal characteristics.