The aim of this study was to investigate the effect of heroin addicts'time perception on their intertemporal decision-making.The time estimation task and in-tertemporal decision task were used to measure the heroin addiction group and control group respective-ly.The results showed that the heroin addiction group showed an underestimation of the long-time interval,and the time estimation error was significantly larger than that of the control group.The delayed discount-ing rate in heroin addict group was significantly higher than that in control group.Results showed that time perception can significantly predict intertempo-ral decision-making in the heroin addict group,but not in the control group.From the perspective of time perception,this study explained the"short-sighted"behavior of heroin addicts in intertemporal deci-sion-making to a certain extent.