The invention discloses a dust collector and a ground brush installation assembly therefor. The ground brush installation assembly comprises a first connection part, and the first connection part comprises a fixed seat, a plurality of sockets, and elastic parts. The sockets and the fixed seat are connected through the elastic parts, and the sockets can slide relative to a fixed plate. The interiors of the sockets are provided with jacks. The ground brush installation assembly also comprises a second connection part which is provided with pins, wherein the pins are disposed in the sockets in a cooperative manner and electrically connected with the sockets. According to the embodiment of the invention, not only the electric contact among internal parts is good, but also the service life is longer.