Device and method for performing jet spinning by means of melt-blown ultrafine fiber

The invention relates to a device and method for performing jet spinning by means of melt-blown ultrafine fiber. The device comprises a melt-blowing device, a cooling bundling device, a jet spinning device and a collection device. The melt-blowing device is used for preparing melt-blown ultrafine fiber and conveying the melt-blown ultrafine fiber to the cooling bundling device; the cooling bundling device is arranged below the melt-blowing device and used for performing cooling and bundling on the melt-blown ultrafine fiber blown by the melt-blowing device; the jet spinning device is used for manufacturing the bundled melt-blown ultrafine fiber into ultrafine fiber yarn by means of the jet spinning method; the collection device is used for collecting the ultrafine fiber yarn. The melt-blown ultrafine fiber is directly spun into yarn or covering yarn, so that the melt-blown fiber is high in content and has the high specific surface area and low fineness and quality and has the good heat insulation, sound absorption, filtering, adsorption and other functions. In addition, due to the fact that the fiber has the good cohesion friction, and the spun yarn has little yarn hairiness and good evenness.