The present application relates to the technical field of auxiliary consumables of preventive medicine, and in particular, to a liquid mask plaster and a manufacturing method therefor, and an anti-haze and anti-bacterial mask comprising the liquid mask plaster. The liquid mask plaster is prepared from raw materials as follows: konjac glucomannan, gomuti palm powder, sodiumalginate, bacterial cellulose, ethanol, propolis, laurocapram, glycerin, ethyl acetate, and cyclodextrin; functional particles having adsorbing and/or photocatalytic decomposition effects, and Chinese herbal medicinal ingredients having traditional Chinese medicine bacteriostatic and/or anti-virus effects are added, so that the liquid mask plaster can be quickly cured to form a membrane on the outer side surface of an existing conventional mask, thereby forming an effective filtration barrier for pollutant particles and/or bacteria and viruses. Thus, inhalation of pollutants such as haze particles can be effectively prevented, and droplet transmission of bacteria and viruses can be effectively prevented.