Mainly designed for large diameter foundation grouting pile construction, YCJF-25 percussive and reverse circulation hydraulic rig has the advantages of large rock breaking energy, high rock breaking efficiency, fast discharging ability and repeated bottom cuttings breaking can be effectively avoided. The paper introduces YCJF-25 percussive and reverse circulation hydraulic rig about its performance parameters, illustrates its structure features and analyzes its construction efficiency.