Skimmed milk was treated with horseradish peroxidase or/and ferulic acid,and used to prepare set-yoghurt.The rheological properties of the skimmed milk and the set-yoghurt prepared were measured with a Rheometer.The analysis results showed that treatment of skimmed milk with horseradish peroxidase or/and ferulic acid had clear influence on the rheological properties of the skimmed milk and the set-yoghurt prepared.The apparent viscosity and viscoelastic behavior of the skimmed milk were increased,meanwhile,the apparent viscosity,thixotropy and viscoelastic behavior of the prepared yoghurt samples were also enhanced.The present work indicates that horseradish peroxidase plus ferulic acid treatment of skimmed milk might be a new approach to improve the rheological properties of the set-yoghurt.