Abstract: In this study,protein isolate was prepared from defatted krill powder through the isoelectric precipitation method.To evaluate film-forming properties of krill protein isolate,the film compared with whey protein isolate and soybean protein isolate,which was made from krill protein isolate,glycerine and water.The results showed that thickness,moisture content and the opacity index showed no significant difference( p>0.05) between krill protein isolate(( 0.070 ± 0.002) mm,15.53% ±0.70%,1.22 ± 0.06) and soybean protein isolate in this system.Based on scanning electron micrograph,the structure of heated krill protein isolate film( F2) was smooth,dense and voidless.The elongation at break( EAB) of F2 was 21.09% ± 0.39%,which was dramatically higher than non-heated krill protein isaolate film( F1)( p<0.05),lower than soybean protein isolate film( F3),but no difference in rensile strength(TS) were observed( p>0.05).Krill protein isolate had fairly good film-forming properties,which was a potential raw material to prepare films in food industry.