Engine exhaust temperature regulation control system

The utility model discloses an engine exhaust gas temperature regulation control system which comprises a cooling unit, a temperature control unit, a temperature control unit and a temperature control unit, and the cooling unit is arranged on an exhaust pipe and used for cooling tail gas in the exhaust pipe; the heating unit is arranged at the air inlet of the catalyst and is used for heating the tail gas entering the catalyst; and the temperature measurement control unit is used for detecting the temperature in the catalytic converter and controlling starting and stopping of the cooling unit and the heating unit. The exhaust pipe has the advantages that the cooling unit is arranged on the exhaust pipe to cool the tail gas in the exhaust pipe, the heating unit is arranged at the air inlet of the catalyst to heat the tail gas entering the catalyst, and the temperature of the tail gas is controlled between the lowest working temperature (250 DEG C) and the highest working temperature (950 DEG C) of the catalyst