A connector assembly includes a first connector, a second connector and a metal housing. The first connector includes an insulating body, conductive terminals, and a first cable, each conductive terminal having a contact portion. The second connector includes a sub-circuit board and a second cable connected to the sub-circuit board, the sub-circuit board having a butting end facing the first connector, and gold fingers being distributed on the surface of the butting end. The metal housing is provided with an insertion hole, the insertion hole having a front insertion opening at the front end of the metal housing and a rear insertion opening at the rear end of the metal housing. The first connector is inserted into the insertion hole from the front insertion opening, and the second connector is inserted into the insertion hole from the rear insertion opening. The contact portions are in contact with the gold fingers.