Abstract: A kind of 2cm ultra-thin concrete overlay on old concrete pavement technology is introduced. The possibility of ultra-thin overlay is analyzed theoretically, and the technical routine and mixture ratio of ultra-thin overlay concrete are studied. The influence of the construction technology on concrete liquidity and mechanical properties are discussed. The road can be opened for traffic after curing 7d in the engineering project by using the early strength and self-compacting type polypropylene fiber fine stone concrete paving technology. After more than a year of use observation, there is no cracking and obvious wear phenomenon on the concrete pavement, therefore, the technology achieves the expected aim of design.