The invention discloses a multi-wing shaped deuterium lamp UV light source which comprises a deuterium lamp (1), a multi-wing shaped housing (2), a temperature control fan (3), a diaphragm (4), a photoelectric probe (5) and a coupling lens (6). Deuterium lamps are widely used in a plurality of high-precision analyzing apparatuses and equipment, the consumables are short in service lifetime, and have strict requirements on temperature during working. The multi-wing shaped deuterium lamp UV light source utilizes the heat transfer mode of diffusion in cooperation with conduction to realize the heat dissipation of the deuterium lamp by forced air cooling. The multi-wing shaped housing and the temperature control fan are used to control the working temperature of the deuterium lamp to the optimum temperature range, thereby prolonging the service lifetime of the deuterium lamp and improving the light source stability. The multi-wing shaped deuterium lamp UV light source is especially suitable for environmental temperature changes. Stable and reliable mechanical interface and electronic interface facilitate use of a deuterium lamp, the deuterium lamp is simple and fast for replacement, and adjustment is not needed. The coupling lens, the diaphragm and the photoelectric probe can improve the integration level and expansibility of the deuterium lamp light source.