According to the theory of compound ecology and the natural conditions of the lake beach in Hongze Lake, the anthors make a suggestion of building a platform fields-pond ecological system project with artifical method, as a new way of developing and using lake beach, thus to minimize the paradox of use and flood controlling, through raising fish in the pond, planting grass on the bank, and growing fruit and grain on the slope.After 3 years' experiment, obvious benefits were achieved in economy, society and ecology.