Projection lamp

The utility model provides a project lamp, which adopts a modularized installation structure and comprises a light source assembly, a heat dissipation assembly, a front housing and a rear cover, the heat dissipation assembly is detachably installed at the rear part of the light source assembly, the rear cover is covered on the heat dissipation assembly, and a plurality of heat dissipation holes are formed in the rear cover; the heat dissipation assembly comprises a vapor chamber, a cooling fin set and a heat dissipation fan embedded in the middle of the cooling fin set, a plurality of liquid cooling copper pipes are arranged on the vapor chamber in a communicating mode, and the multiple liquid cooling copper pipe vertical pipes penetrate through the cooling fin set; the liquid cooling copper pipe is filled with cooling liquid; through cooperation of the vapor chamber, the liquid cooling copper pipe and the cooling fin combined cooling fan, air cooling and liquid cooling dual heat dissipation is achieved, and