The invention discloses a black water regulating valve assembly. The black water regulating valve assembly comprises a valve seat, a valve body, a valve seat ring, a guide ring, a valve rod, an uppervalve cover and a flange, and a purging channel which penetrates through an inner cavity of the guide ring and is used for introducing gas into the guide ring is formed in the valve cover. According to the black water regulating valve assembly, an air inlet of the purging channel is externally connected with a high-pressure air source pipe to introduce high-pressure air into the guide ring, mediaadhering to the guide ring and the valve rod are purged cleanly through the high-pressure air, the valve rod can move up and down in the purging process, and the matching surface of the valve rod andthe guide ring interact to facilitate falling of the media, so that the purging effect is improved; and by the structure, the valve can be purged regularly, valve jamming caused by medium accumulationcan be effectively prevented, the abrasion condition of all parts of the valve is improved, the service life of the valve is prolonged, and the maintenance cost of the valve is reduced.