The invention relates to a carburetor. The carburetor comprises a floater chamber, an oil nozzle, an atomizing ring and an atomizer. The upper portion of the oil nozzle is arranged at the upper end of the floater chamber, the lower portion of the oil nozzle stretches into the floater chamber, the upper end of the oil nozzle is sleeved with the atomizing ring, the upper portion of the atomizing ring and the upper portion of the oil nozzle are wrapped by the atomizer, a detachable filter screen is arranged on an oil inlet in one side of the floater chamber and is in a circular ring shape, a magnet is arranged on the ring outside the filter screen, and the lower end of the floater chamber is provided with a heating device. Compared with the prior art, the carburetor has the beneficial effects that the filter screen can be mounted and dismounted, oil gas in the carburetor can be preheated, and the oil gas atomizing quality is improved.