The invention discloses an integral rotary high-pressure jet cutting head. The integral rotary high-pressure jet cutting head comprises a power chamber, a centralizing chamber, a transmission chamber, a pressure air rotating motive-seal chamber and a cutting work chamber which are sequentially connected from top to bottom. The integral rotary high-pressure jet cutting head does not adopt high-pressure rotating motive seal and is suitable for a high-frictional-resistance well section of a large-displacement well, the problems of a waste platform dismounting technology and device insufficiency can be solved, and the significant technical demand for developing ocean energy resources of our country is economically and safely met in an environmentally friendly mode.