The embodiment of the invention provides a preparation method of a
composite material layer, the
composite material layer and a
mask. The preparation method comprises the following steps: preparing ananofiber filter layer on a first protective layer by adopting an
airflow spinning process, connecting the second protective layer with the first protective layer, so that the
nanofiber filter layer is clamped between the first protective layer and the second protective layer and a
composite filter layer is formed, and laminating the
composite filter layer on the support layer to obtain the
composite material layer. The embodiment of the invention provides the preparation method of the composite material layer, the composite material layer and the
mask. The
nanofiber filter layer on the firstprotective layer is prepared by adopting an
airflow spinning process, and the composite material layer is used as the core filter layer of the
mask, so that the mask can be used for many times after being effectively disinfected and sterilized by
alcohol, high temperature,
ultraviolet rays,
fumigation, boiling and the like, the productivity and the use cost are greatly saved, and the waste and thepost-treatment
pollution are reduced.