Abstract: The present invention provides an active catalytic converter, which includes primarily catalytic carriers, an isolation supporter, a heat insulator, and a conducting wire, wherein the catalytic carriers are self heating electrothermal catalytic carriers isolated and supported by layers of plates installed on the isolation supporter, so as to allow hazardous gases to flow through the catalytic carriers to perform a catalysis reaction. The heat insulator is used to hold the catalytic carriers and the isolation supporter, and the conducting wire is used to connect with the catalytic carriers and a power supply. The catalytic carriers are quickly heated up to a catalysis temperature at the same time of activating the power supply.