Abstract: Atotal of 840samples of mooncakes we re collected fromcommercial foods.The dominant fungi of moon-cakes were isolated.The most common spoiling fungi isolated from840bak ery products belong to the genera Pen icilli-um,Aspergellus,Monilia,Mucor,Fusarium and Rhizopus.The dominant fu ngi isolated from the samples were Penicillium and Aspergellus,which was counted for 42%and 37%of the whole respectively.The effect of cin-namaldehyde on the growth and reprod uction of the mixture fungi isolated fromthe samples was studied in the te st.The result showed that the paper impregn ated with 10mg and 20mg cinnamaldehyde could inhibit the growth of the iso lated fungi completely for 20days.The pap er(2cm ×2cm)containing 20mg cinnamaldehyde was packaged with 100g mooncakes which were inoculated with 0.5ml Pnicilliumand Aspergellus.Cultivated at 28℃for 20days,the con trol group found mould in2days,and the te st group has not been observedany mou ld for 20days.

Key words: Antimould , Mooncake , Cinnamaldehyde