Retaining ring press-in tool

The utility model provides a retainer ring press-in tool, and relates to the technical field of tools. The check ring press-in tool comprises a guide table and a pressing head. The guide table is provided with a slide way, a funnel channel and a mounting channel; the large opening end of the funnel channel is communicated with the slideway, and the small opening end is communicated with the mounting channel; the workpiece is inserted into the mounting channel, the small opening end of the funnel channel is aligned with a to-be-mounted inner hole of the workpiece, and the inner diameter of the small opening end is smaller than that of the to-be-mounted inner hole; the pressing head comprises a sliding rod and a pressing rod; the sliding rod freely slides along the sliding way, and the diameter of the pressing rod is smaller than the inner diameter of the small opening end and larger than the inner diameter of the check ring. In the using process of the check ring pressing-in tool, a workpiece is inserted into