The invention relates to a buried high-power wireless charger transmitting end heat dissipation system based on a phase change material. The system comprises a heat dissipation device and a cooling subsystem, and the heat dissipation device comprises an external shell box, and a plurality of I-shaped cavities which store the phase change material, wherein the I-shaped cavities are disposed in theexternal shell box, and form a sealed air duct cavity with a heating layer of a wireless charger transmitting end through enclosing. The cooling subsystem comprises a fan, an air inlet pipe communicated with the fan and one end of the air duct cavity, and an exhaust pipe communicated with the other end of the air duct cavity. Compared with the prior art, the LED lamp has a good heat dissipation effect and the like.