Abstract: Six concrete filled square steel tubular(CFSST) columns were tested under low cyclic loads for studying their accumulate energy dissipation performance.The effects of test parameters,such as slenderness ratio,axial compression ratio and sectional steel ratio,on the hysteretic curves,strength deterioration,and accumulate plastic deformation were analyzed.It is indicated that these columns have a better energy dissipation capacity.The energy dissipation capacity improves with the sectional steel ratio increasing,but it reduces when the axial compression ratio and the slenderness ratio increase.