Four types of solutions were proposed to meet the heat dissipation requirement of angel eye automobile headlight, with junction temperature tester and thermocouple employed to measure the LEDs junction temperature and the bottom side temperature of LED mounted metal core printed circuit board (MCPCB) for the comparative study of their heat dissipation performances. It was found that surface mounting technology（SMT） welding solution presented a better heat dissipation performance than riveting solution did, and thermoelectric separation MCPCB beat regular MCPCB to dissipate heat generated by LEDs using SMT technology. When the ambient temperatures were （25±1） and （90±3） ℃ respectively, the heat dissipation effects of the four schemes are as follows: LED mounted on 0.4 mm thermoelectric separation MCPCB using SMT method > LED mounted on 0.3 mm regular MCPCB using SMT method > LED mounted on 1.0 mm regular MCPCB using riveting method > LED mounted on 0.3 mm regular MCPCB using riveting method. When the ambient temperature was （25±1） ℃, the above four types of heat dissipation solutions resulted in junction temperatures within the limit temperature of 135 ℃. But when the ambient temperature was （90±3） ℃, only LED mounted on 0.4 mm thermoelectric separation MCPCB using SMT method produced the junction temperature below the limit temperature of 135 ℃.