Abstract: The invention relates to a method of cleaning a pipe (12) by action of a fluid under very high pressure. It is characterised in that the fluid under very high pressure is caused to pass in a flexible tube (14); said tube is subjected to the action of motorisation means (5) for longitudinal advance, and means for driving the tube (14) in rotation around its longitudinal axis; these motorisation means (50) are regulated by management means (48) and rotation detection means (47) and/or pinpointing longitudinal advance, and these means of driving in rotation; the tube (14) is guided near the entrance of the pipe (12). The invention also relates to a device for implementing this method.