The invention discloses rotary digging equipment for building. The rotary digging equipment for building comprises a machine body, a moving device, a drill arm, a hoisting device, a drill bit, a drillbit driving piece and a vibrating device, the moving device is arranged on the lower portion of the machine body, the hoisting device is matched with the drill arm, the drill bit driving piece is used for driving the drill bit to rotate, and the vibrating device is arranged between the drill bit driving piece and the drill bit; the vibrating device comprises a protective shell and a vibrating piece arranged in the protective shell, the drill arm penetrates into the protective shell and then is connected with the vibrating piece, and the drill bit penetrates into the protective shell and thenis connected with the vibrating piece; and a first sealing structure is arranged between the protective shell and the drill arm, and a second sealing structure is arranged between the protective shelland the drill bit. The rotary digging equipment for building is provided with the vibrating device so that the drill bit can further vibrate synchronously in the process of high-speed rotating, the hole drilling strength is high, other tools such as a down-the-hole drill are not needed, and the construction efficiency is high.