Cold-rolled ribbed steel wires with improved elongation is a new type of cold-rolled steel wires, this paper presents the test results of 6 concrete slabs reinforced by the cold-rolled ribbed steel wires with improved elongation under flexure, the flexural characteristics, bearing capacity, deflection and cracking of these slabs under loading are analyzed, the formulas for calculating the flexural bearing capacity, the deflection and crack width of the slabs are suggested. This may be as a reference for the applications of this new type of cold-rolled steel wires, and for the revision of Chinese Code Technical specification for concrete structures with cold-rolled ribbed steel wiresJGJ95-2011.