Abstract: Dietary fiber was extracted from pine residue,the hypoglycemic and hypolipidemic functional properties of dietary fiber and pine residue after ultrafine grinding were compared with the control group in order to evaluate the influences of ultrafine grinding treatment. The results showed that ultrafine grinding could not lead to a significant increase in dietary fiber content,but it could improve the functional properties of pine residue and dietary fiber,and dietary fiber had better functional properties than pine residue.Compared with the coarse powder,the glucose-adsorption capacity,amylase-inhibitory activity,bile acid-adsorption capacity and bile acid-binding capacity of micro-powder were increased significantly( p < 0.05),glucose retardation index achieved the maximum at 30 min.Pine residue and dietary fiber had a significantly better cholesterol-absorption ability at pH7.0than that at pH2.0.It concluded that a certain degree of ultrafine grinding of dietary fiber can improve its functional properties.