Silencer with catalyst vector

A muffle equipped with an accelerant carrier is connected to a vent-pipe at the exhaust gas outlet end of an engine and provided with a tail pipe communicated with the outside atmosphere; an accelerant carrier and another back gas channel are arranged inside the muffle, and an exhaust channel and a plurality of exhaust through-holes are formed inside the carrier so as to cause one end of the exhaust channel to be communicated with the vent pipe, and the other end to be communicated with the back gas channel; one end of each of the plurality of exhaust through-holes is caused to be communicated with the back gas channel, while the other end thereof is communicated with the tail pipe; an accelerant is attached to hole walls of the plurality of exhaust through-holes; and in this way, the exhaust gas first passes through the exhaust channel and then through the plurality of exhaust through-holes after heating the accelerant attached to the hole walls of the plurality of exhaust through-holes to the burning temper