The invention relates to the technical field of traffic safety of expressways, in particular to an expressway exit curved slope ramp sight induction system, which is characterized in that corresponding first-stage, second-stage and third-stage sight induction systems are respectively arranged in road section areas with speed limits of 40km/h and below, 40-60km/h and 60km/h and above; the sight line induction system comprises a high-frequency rectangular attached delineator arranged at the bottom of the guardrail, a medium-frequency combined rectangular attached delineator arranged in the middle of the guardrail and a medium-frequency warning linear induction mark arranged on the outer side of the guardrail, and the high-frequency rectangular attached delineator, the medium-frequency combined rectangular attached delineator and the medium-frequency warning linear induction mark are graded according to different speeds. The round delineators, the rectangular attached delineators and thevisual reference columns are arranged on the inner sides and the upper portions of the guardrails, so that delineator induction of a curved slope section can be improved, the sensing capacity of a driver to a curve and a longitudinal slope is enhanced, the driver is effectively warned, and the starting section, the middle portion and the ending section of the ramp are each provided with an annularlight reflection structure. And a lane indicator is arranged below the annular reflective structure so as to ensure that a driver can discover within a decision sight distance.