The utility model relates to a piece alkali baling line weighing device, including base, weighing sensor, sensor jib, limiting angle piece, weighing sensor one end and base fixed connection, the otherend with limiting angle piece fixed connection, the sensor jib with the limiting angle piece rotates to be connected, its characterized in that, be equipped with the restriction on the base the stopdevice of weighing sensor displacement. At current weighing sensor both sides installation fixed plate, both sides adjusting bolt is adjustable for the bolt is unanimous to the clearance of limiting angle piece, the displacement of restriction sensor.