To overcome the defects in the prior art, the invention provides an automobile air-conditioning energy recovery system which is obtained by improving the conventional automobile air conditioning equipment. An air outlet is formed near the air inlet of the automobile air conditioning equipment, and a horizontal heat pipe heat exchanger is additionally mounted. An air filter is mounted at the front end of the external air inlet of the horizontal heat pipe heat exchanger; the external air outlet of the horizontal heat pipe heat exchanger is communicated with an air inlet chamber; the internal air inlet of the horizontal heat pipe heat exchanger is communicated with a cab via an internal air inlet control choking plate. According to the automobile air-conditioning energy recovery system, not only can air in the cab be fresh, but also waste heat of air in an automobile can be utilized efficiently to avoid energy waste; moreover, fresh air entering the automobile is preheated or cooled in advance, so that energy supply of an engine is reduced, and the purposes of energy conservation and environment protection are realized.