Fracturing string and fracturing method thereof

The invention discloses a fracturing string and a fracturing method thereof. The fracturing string comprises a casing string, a plurality of sets of intelligent ball injecting fracturing sliding sleeves and a differential pressure sliding sleeve; the casing string is formed by connecting a plurality of strings in series; at least one set of intelligent ball injecting fracturing sliding sleeves which is connected in series is arranged on casings at separating layer positions; and the differential pressure sliding sleeve is connected to the lowest end layer position of the casing string in series. 本发明公开了一种压裂管柱及其压裂方法，压裂管柱包括：套管柱、多套智能投球压裂滑套及压差滑套；套管柱，由多根套管串接组成；多套智能投球压裂滑套，每一分隔层位的套管上连接有串接的至少一套所述智能投球压裂滑套；压差滑套，串接于所述套管柱最下端层位。