Based on the theory of systems ecology and model of PSR,the paper constructed an evaluation index system of recreation ecological security for islet in river of city.The system included three subsystems (core region of islet,buffer re-gion of river,influence region of city)and three factors (pressure,state,response).Taking the Dongzhou Islet in Hengy-ang city,Hunan province as an example,the empirical study was conducted in the paper.The results showed that the de-gree of recreation ecological security for islet in river of city is low and the different subsystems have differentiated charac-te...