The invention discloses a non-bearing assembling type sound insulation partition wall suitable for a steel structure building. The non-bearing assembling type sound insulation partition wall suitable for the steel structure building comprises a fixing groove, a partition wall plate and a connecting part. The fixing groove is used for fixing the partition wall plate and consists of a steel groove, a first fixing bolt and a rubber blanket. The steel groove is fixed on the lower portion of a steel beam through the first fixing bolt. The rubber blanket is arranged in the steel groove through an adhesive. The partition wall plate is composed of a partition wall plate material, an adhesive layer, a rubber blanket layer and a sound absorbing mineral wool strip. Grooves are formed in the bottom of the partition wall plate materialand one side of the side edge. Bulges matched with the shapes of the grooves are formed in the other side of the side edge of the partition wall plate material. Square grooves are formed in the four corners of the partition wall plate material. The rubber blanket layer and the sound absorbing mineral wool strip are arranged in the grooves from inside to outside in sequence. The connecting part is composed of a supporting plate, a hinge piece, a rotating shaft, a fixing plate and a second fixing bolt. According to the non-bearing assembling type sound insulation partition wall suitable for the steel structure building, by advancing an installing way and a structural joint of the partition wall, dry type operation is adopted, construction procedures are reduced, the construction speed is improved, and meanwhile, the good sound insulation effect is achieved.