Single-pipeline pressure-adjustment type double-end-blocked fracturing machine and fracturing method

The invention relates to a single-pipeline pressure-adjustment type double-end-blocked fracturing machine and a fracturing method. The single-pipeline pressure-adjustment type double-end-blocked fracturing machine comprises a tail hole sealing machine, a communicating pipe and a front part hole sealing machine which sequentially communicate with one another in a drilling direction; a fracturing unit is arranged between the front part hole sealing machine and the tail hole sealing machine; the fracturing unit consists of a pressure adjustment part and a fracturing part; before fracturing of anore deposit is carried out, the pressure adjustment part is used for setting the opening pressure of the fracturing part; the tail hole sealing machine is connected with a high-pressure water fillingdrill rod; the high-pressure water filling drill rod is connected with a pump station and extends into a drilled hole so that the fracturing unit is placed at a to-be-fractured position; the tail holesealing machine and the fr