BAOYI hydraulic conrol check butterfly valve is composed of the central-line butterfly valve as the basic component and the hydraulic control device, and can be rapidly operated and slowly closed, thus to maximally eliminate water hammer and accordingly protect the pipeline system. The product design can meet such relevant standards as API 609 and EN 593. Generally, the product can be widely applied in the automatic pump station systems for electric power, metallurgy, urban water supply and drainage, etc. to cut off medium and control medium return.