The invention discloses a nonwoven fabric, made with the following materials according to parts by weight: 70-80 parts of PET (polyethylene terephthalate), 15-20 parts of PLA (polylactic acid), 5-10 parts of an antibacterial agent, 10-15 parts of acrylic adhesive, and 1-2 parts of diatomaceous earth; diatomaceous earth particles are fine and porous and can improve filtering precision of the nonwoven fabric, microorganisms such as Escherichia coli are filtered, direct filtration under non-uniform fiber pore size of the nonwoven fabric is avoided, filtering effect of the nonwoven fabric is guaranteed, the antibacterial agent can inhibit reproduction of the microorganisms such as bacteria, antibacterial capacity of the nonwoven fabric is improved, and therefore the produced nonwoven fabric has good antibacterial performance and high filtering precision. The invention also discloses a production process and application of the nonwoven fabric.