In order to study force performance of a new column,it is described the test results of nine stub-columns with partially encased welded H-section steel.The test studies the effects of steel ratio,width-thickness ratio of flange and space of horizontal bar on ultimate strength of short column.It has been found out by analysis that on condition of different steel ratios,the ultimate bearing capacity of a column is affected directly by the bearing capacity of PEC short column under axial load and its influencing factors,as well as steel ratio.