The invention discloses a service-building elevator which comprises an outer shell. The outer wall of the outer shell is connected with a sound insulation cover in a sleeved mode. A material inlet isformed in one side of the bottom end of the outer shell. A material outlet is formed in one side of the upper end of the outer shell and is further connected with a flow adjusting plate in an inserting mode. A vibrating device is detachably installed on the outer wall of the outer shell. A dust sucking opening is connected with a dust removing box through a dust sucking pipe. The dust removing boxis connected with a draught fan through the dust sucking pipe. The dust removing box is provided with an opening, and the opening is detachably provided with a box cover. Fixing blocks are welded tothe two sides of the inside of the dust removing box. The fixing blocks are connected with a filter screen through bolts. Driving rollers are installed at the upper end and the lower end of the insideof the outer shell. The two driving rollers are connected through a conveying chain. The driving roller at the upper end is connected with a motor in a rotating mode through a belt. Baffles and chaindisengaging prevention devices are installed at the two sides of the inner wall of the outer shell. The service-building elevator has the effects that chain disengaging of a hopper can be prevented and pollution to the working environment by dust can be avoided.