The invention belongs to the technical field of fresh keeping agents, aims to develop a composite fresh keeping agent including
microorganism derived effective components and
plant derived effective components, is used for fresh keeping and
corrosion resistance for picked fruits and picked vegetables, and provides a
microorganism and
plant derived composite fresh keeping agent for
fruits and vegetables. The composite fresh keeping agent is prepared from a component A and a component B, wherein the component A consists of
microorganism fermentation fluid and a
propolis extract, and microorganisms are
bacillus amyloliquefaciens Lh-1, candida intermedia and
cryptococcus laurentii; and the component B consists of
plant derived effective component mixed liquor and film forming liquor, wherein the plant derived effective component mixed liquor is prepared by mixing a tree peony
bark water extract with a citrus peel
alcohol extract, a
rabdosia rubescens alcohol extract, a radix zanthoxyli water extract, a
lycium ruthenicum
alcohol extract, a Chinese herbaceous peony water extract, a
clinopodium chinense alcohol extract and a citronella water extract, and the film forming liquor is prepared by mixing
konjac glucomannan with
chitosan. Through the adoption of the composite fresh keeping agent, the fruits and the vegetables are furthest prevented from mildewing and rotting, the effects for preventing the fruits and the vegetables from
postharvest diseases are enhanced, the
moisture dissipation of the fruits and the vegetables is reduced, the storage time of the fruits and the vegetables is prolonged, and a certain economic value is created.