Abstract: In the experiment,six groups of high-performance concrete specimens with different admixtures were tested in an artificial climate environment chamber with constant temperature and dampness.Through the experiment,the influences of six admixtures'(including early strength agent,water-reducer,air-entraining agent,fly ash,and slag) on high-performance concrete's creep properties were obtained.According to the experimental data and theoretical analysis,the creep developing law of high-performance concrete was performed.According to the comparison and analysis between the experimental data and calculated data based on Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts(JTGD62—2004),the creep coefficient of high-performance value using 0.8 times result based on this code is proposed.A formula for the calculation of high-performance creep coefficient is presented according to the experimental data.