Ball latch wire-line coring hydro-hammer was developed to solve the inner tube assembly fluctuation of existing SYZX series wire-line coring hydro-hammers, by which, the output impact work is increased with further drilling efficiency improvement. The indoor and production tests confirm that the principle of ball latch wire-line coring hydro-hammer drilling tool is feasible. The fishing and positioning reliability of this hammer are more than 95%, but some partial details still need to be improved in future productive practice.