Handheld extension set of combined dust collector

The utility model belongs to the technical field of dust collectors, particularly relates to a handheld extension set of a combined dust collector, and aims to solve the problems that most of the conventional vertical dust collectors are provided with extension sets with smaller volumes, the extension sets are difficult to hold when being used by children at home, and the front ends of the extension sets have larger calibers, so that the extension sets cannot be held easily when being used for cleaning corners. In order to solve the problems that in the prior art, a small air suction head needs to be independently arranged, the dust collector comprises a dust collector body, an extension set body is installed on one side of the bottom of the dust collector body, a fixing shell is fixedly connected to one side of the extension set body, a containing groove is formed in the top of the fixing shell, and two auxiliary suction heads are placed in the containing groove; a protective cover is rotatably mounted in on