The invention relates to a vibration reducing device for a building. The vibration reducing device comprises a top plate, a bottom plate and a vibration reducing assembly arranged between the top plate and the bottom plate; the vibration reducing assembly comprises a longitudinal vibration reducing assembly and a transverse vibration reducing assembly sleeving the longitudinal vibration reducing assembly; the transverse vibration reducing assembly comprises a vibration reducing elastomer sleeving the longitudinal vibration reducing assembly, a plurality of supporting columns I and a plurality of supporting columns II, wherein the multiple supporting columns I and the multiple supporting columns II are arranged in the vibration reducing elastomer in the longitudinal direction in a staggered mode; and the multiple supporting columns I are correspondingly arranged on the outer sides of the multiple supporting columns II and used for being matched with the supporting columns II to abut against the corresponding supporting columns I and buffer the borne transverse shear force when transverse vibration generates displacement. Energy absorbing and vibration reducing to borne longitudinal vibration force and transverse vibration force in different directions can be facilitated, meanwhile, the higher structure stability is achieved, the conventional anti-seismic requirements of the building are met, vibration noise pollution brought by vibration sources near the building can be further lowered effectively and advantageously, the structure is simple and compact, and manufacturing is easy.