Abstract：The aim of this study was to investigate the effect of heroin addicts' time perception on their intertemporal decision-making. Time estimation task and intertemporal decision task were used to measure heroin addiction group and control group respectively. 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 discounting rate in heroin addict group was significantly higher than that in control group. Time perception can significantly predict intertemporal 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 decision-making to a certain extent.