Photocuring 3D printer convenient for heat dissipation

The photocuring 3D printer comprises a printer body and a radiator, the printer body is provided with an ultraviolet light source and a protective shell, a heat dissipation cavity is formed in the radiator, the heat dissipation cavity is provided with a heat conduction opening, an air inlet and an air outlet, the heat conduction opening is covered with a semiconductor cooling fin, and the air inlet is communicated with the heat conduction opening. The heating surface of the semiconductor radiating fin faces the radiating cavity and is connected with radiating fins, the refrigeration surface of the semiconductor radiating fin is attached to the ultraviolet light source, the exhaust port is connected with a radiating fan, and an air outlet of the radiating fan is connected with a concentration cover; the protective shell is provided with a pipeline opening, and an exhaust pipe is connected between the pipeline opening and the concentration cover. The semiconductor cooling fins and the cooling fins accelerate to