Adjustable drilling device for constructional engineering

The utility model discloses an adjustable drilling device for constructional engineering, which comprises a supporting device, a rotating device and a sliding device, a liftable tray is mounted on the supporting device, the rotating device is mounted above the tray through the supporting device, the sliding device is rotatably mounted on the rotating device, and the sliding device circumferentially rotates through the rotating device. A sliding ring is slidably mounted on the sliding device, a motor mounting seat is hinged to the lower end of the sliding ring, an angle adjusting device is arranged between the sliding ring and the motor mounting seat and controls the rotating angle between the motor mounting seat and the sliding ring, a motor is fixedly connected to the lower end of the motor mounting seat, and a drill bit is mounted on an output shaft of the motor. The drilling position and the drilling-in angle can be adjusted at will during drilling, corresponding workers can conveniently conduct drilling o