It was presented a new light-weight energy-saving composite floor slab, which composed of light-gauge shaped steel, thermal insulation core material and thin panel.The light-weight energy-saving composite floor slab integrates the functions of enclosure, separation, heat-insulation and load-bearing.The paper presented the test of six floor slab specimens in full-scale under concentrated load.According to the damage process and test data, it was studied damage pattern and forced featurse of the floor slab.It was put forward that suggestions on creating calculation formula of bending capacity, and the test data provided a basis for working out relevant codes in the future.