This paper introduces the development status and existing problems of hot rolled dual-phase steel，and points out that the development and application of low-cost hot rolled dual-phase steel，F-B hot rolled dual- phase steel and high strength hot rolled dual- phase steel would promote the development of hot rolled dual phase steel and the process of replacement of cold rolled products by hot rolled ones in automobile industry. Strengthening mechanism and process control principle of hot rolled dual-phase steel strengthened by ferrite matrix with fine precipitates are also discussed. And the hot rolling experiments were carried out at laboratory.The hot rolled dual-phase steel strengthened by ferrite matrix with fine precipitates has been developed. This steel contains martensite islands and ferrite matrix distributing a large number of supersaturated precipitates and interphase precipitation of finer nano-sized TiC，whose tensile strength reaches up to 770~830 MPa with the yield ratio of less than 0.75.