A method for economically mass-producing thin plate-shaped microchannel plate, includes: coating the surface of one or more strands of microfiber with a predetermined diameter with a polysilazane or polysiloxane binder; winding one or more strands of binder-coated microfiber onto a bobbin to form a microfiber bundle; curing the binder while the shape of the microfiber bundle is fixed; and slicing the binder-cured microfiber bundle to manufacture the plate.