Hydraulic concrete structures underlie particular conditions all year round,so they have suffered from severe degradation.Contents of 0.6,1.6 and 2.6 kg·m3polypropylene fiber(PP fiber)and basalt fiber(BF)were added to the plain mortar(M0)respectively to prepare repair materials for hydraulic structures surfaces.The bond strength,abrasion resistance,water permeability and freeze-thaw resistance were tested and analyzed.Test results indicate that the addition of fiber improves the bond strength of mortar significantly.Compared with M0,the bond strength of PP fiber and BF reinforced mortar presents an increase of 16.60%～28.80% and 10.60%～21.40% respectively.Besides,the abrasion resistance,water permeability and freeze-thaw resistance are also enhanced due to the addition of fiber.The abrasion resistance strength of PP fiber and BF reinforced mortar are 77.30% and 38.65% more than M0 when the fiber content is 2.6 kg·m3.The field tensile strength test indicates that the tensile strength of these two kinds of fiber reinforced mortar is sufficient.With no increase in cost,fiber reinforced mortar is suitable to be used to repair hydraulic concrete surfaces.