Underwater rock drilling device and mounting method thereof

The invention belongs to the technical field of underwater rock drilling, and particularly relates to an underwater rock drilling device and an installation method thereof.The underwater rock drilling device comprises a mother ship provided with a track; the walking device is assembled on the track; the bracket is mounted on the walking device; the traction device is mounted on the bracket; the hydraulic impact hammer is connected with the traction device; a power station; the rock drilling head is mounted at the bottom of the hydraulic impact hammer. The rock drilling head abuts against rock needing to be crushed, the power station provides power for the hydraulic impact hammer, the hammer core hits the rock drilling head below in a free falling mode, and when the hammer core hits the underwater rock drilling head, the tip end of the rock drilling head will crush the rock below, and the purpose of rock drilling is achieved. The installation method of the underwater rock drilling device comprises the steps th