The utility model discloses a beam -pumping unit well head packing adds device belongs to beam -pumping unit oil recovery field. The device includes: mounting platform, adjusting screw, ARC slide block, move movable support, spacing support, packing depression bar. The mounting platform includes circular track, fixed platform, mounting sleeve, and circular track lateral wall is equipped with round ARC through groove, and mounting sleeve installs on beam -pumping unit well head packing box. It includes horizontal upper arm, vertical side arm and horizontal underarm to move movable support. Spacing support includes linking arm and vertical sleeve pipe. Adjusting screw passes horizontal underarm, circle ARC through groove, ARC slide block in order, will move movable support and ARC slide block and fix on circular track, and the fixed position who just moves movable support can follow the adjustment of circular track periphery, horizontal upper arm can be dismantled with the linking arm and be connected, makes vertical sleeve pipe can follow circular track and radially adjusts, the packing depression bar passes vertical sleeve pipe to can follow vertical sleeve pipe up -and -down motion. The device is effectual to the compaction of beam -pumping unit well head packing, and the operation is safe nimble.