The invention discloses a comprehensive heat management system recycling engine exhaust energy. The comprehensive heat management system recycling the engine exhaust energy comprises an engine exhaust pipe and further comprises a cooling liquid heat exchange device and an engine oil heat exchange device. The cooling liquid heat exchange device comprises a cooling liquid preheating box and a cooling liquid heat exchange pipe. The cooling liquid preheating box is provided with a gas inlet and a gas outlet. The gas inlet communicates with a tail gas inlet of the engine exhaust pipe, and the gas outlet is connected with the engine oil heat exchange device. The cooling liquid heat exchange pipe is located in the cooling liquid preheating box. Cooling liquid is fed into the cooling liquid heat exchange pipe. The engine oil heat exchange device comprises an engine oil heat exchange pipe and an oil pan. The comprehensive heat management system recycling the engine exhaust energy greatly shortens the warm-up time needed during cold start, shortens the duration of the process that the engine oil temperature rises to the normal work temperature, reduces the abrasion of important parts of an engine and the pollutant emission caused by incomplete combustion and achieves the dual purposes of saving energy and protecting the environment.