The invention discloses a computer group assembly rack used in a computer working room. The computer group assembly rack comprises a computer group assembly rack body, wherein the computer group assembly rack body comprises a support plate and a stabilization bottom plate, wherein the support plate is arranged above the stabilization bottom plate. A computer mainboard is convenient to install by amainboard installation room, the top of a computer installation rack is opened, so that corresponding computer electronic equipment is conveniently arranged on the computer mainboard; and a computerpower supply is convenient to install by a power supply installation room, power lines in the computer installation rack are conveniently arranged by outgoing line holes and line arrangement strips, the safety coefficient is improved, the circuit is prevented from being excessively disordered to cause that instrument equipment cannot be normally cooled and the equipment is damaged, the advantagesof installation convenience and small occupancy space are achieved, so that the problems that an existing computer case occupies relatively large space and space arrangement of the computer room is not convenient are effectively solved.