Metalens have gradually replaced or supplemented traditional refractive and diffraction lenses with their unique advantages, leading to further miniaturization of high-performance optical devices and systems. This miniaturization is expected to lead to compact nanoscale optical devices for applications in cameras, lighting, displays, and wearable optics. However, in conventional metalens designs, the Pancharatnam-Berry (PB) phase usually requires the chirality limitation of left and right circularly polarized light. In order to avoid the incident limitation of the linearly polarized light by the left-handed circular polarization (LCP) and right-handed circular polarization (RCP), an all-dielectric metalens based on PB phase was designed to achieve near-field focusing of linearly polarized light. It coincides with the main output wavelength (visible band) of the metasurface filter. The effects of various variables on the focusing properties of the light field were studied and verified by effective time-domain difference simulation in this paper. The unprecedented design freedom of metalens and other metasurface optical components will greatly expand the application fields of micro-optics and integrated optics.