Abstract:The effects of steam explosion on the yield，physicochemical and functional properties of seabuckthorn pomace soluble dietary fiber were investigated by using the material of seabuckthorn pomace（SBP）.After seabuckthorn pomace was treated by steam explosion，the changes of soluble dietary fiber yield，physicochemical and functional properties before and after treatment with steam explosion were investigated.The results showed that the soluble dietary fiber content of seabuckthorn pomace was increased from 4.37%to 24.71%after steam explosion pretreatment.The physicochemical properties of soluble dietary fiber before and after steam explosion：water holding capacity（3.44 g/g-8.36 g/g），oil holding capacity（1.23 g/g-3.06 g/g）and water swelling capacity （2.04 mL/g-4.17 mL/g），functional characteristics index：glucose absorption capacity（3.87 mmol/g-9.14 mmol/g），cation exchange capacity （0.31 mmol/g-0.94 mmol/g），the inhibitory ability of α-amylase（22.05%-40.13%）and the inhibitory ability of pancreatic lipase（12.44%-24.64%）were significantly increased （P＜0.05）.Infrared spectroscopy showed that the structure of seabuckthorn pomace soluble dietary fiber（SDF）was not destroyed after steam explosion.Scanning electron microscopy showed that the surface of SDF after steam explosion became wrinkled and many holes appeared.