Dismounting device for sampling needle assembly

The utility model relates to the technical field of dismounting of sampling needle assemblies, in particular to a dismounting device for a sampling needle assembly. Comprising a fixing rod, one end of the fixing rod is provided with a sleeve which can sleeve the upper portion of a sampling needle assembly, the sleeve is provided with a plurality of spring plungers which can be bounced into a U-shaped groove of the sampling needle assembly, and the shape of the inner wall of the sleeve is attached to the shape of the upper portion of the sampling needle assembly. By arranging the sleeve, the upper part of the sampling needle assembly is sleeved with the sleeve during use, and the sleeve is driven to rotate by rotating the fixing rod, so that the sampling needle assembly is driven to rotate; and through the arrangement of the spring plunger, the column head of the spring plunger is bounced into the U-shaped groove of the sampling needle assembly during use, so that the sleeve and the sampling needle assembly ar