The invention discloses monascus purpureus with antiseptic function, and belongs to the field of microbes. The invention aims to provide a monascus purpureus strain which has good bacteriostatic and antiseptic functions while keeping the original coloring function and has inhibiting effect on the common bacillus subtilis, Escherichia coli and saccharomycetes in food. The monascus purpureus with the antiseptic function is monascus purpureus W5S7 and collected in China General Microbiological Culture Collection Center, and the collection number is CGMCC No.4174. The monascus purpureus lays a foundation for application of biological preservatives in the antiseptic field of the food.