Fracturing stimulation method

The invention provides a fracturing stimulation method. The fracturing stimulation method comprises the following steps that 1, a fracturing string is put in a stratum where an old crack is located, and hydraulic fracturing is carried out on a perforation section of the stratum to open the old crack; 2, the old crack is shielded and temporarily blocked through propping agents, a sand compartment and temporary blocking agents, and a main crack and branch cracks are formed; 3, a ball is thrown to knock out a sliding sleeve flow controller on the fracturing string; 4, quick water carries propping agents to support the branch cracks, and base fluid and crosslinked fluid carry propping agents respectively to support the main crack. The fracturing stimulation method particularly replaces an infill well to improve the recovery ratio of a maturing field, use and potential tapping of lateral remaining oil of the old crack are achieved, the recoverable reserve is increased, the modification size of the stratum is also increased, and the stratum recovery ratio of the maturing field is improved.