Abstract: A kind of slope and antislope compensation circuit based on 2 μm BJT IC process is presented. The effects of piecewise 1inear slope compensation to the load capacity are analyzed. Based on the analysis we propose the antislope compensation circuit structure. The structure overcomes slope compensation's shortcoming which is the compensation decreases the peak current. And at the same time, the structure guarantees the effect of slope compensation and improves load capacity. At the end of this article, results of the simulation based on 2 μm BJT process are presented, which obtain that the structure performs well.