The invention discloses a fracturing technology for improving effective support of a shale fracturing complex fracture network. The fracturing technology comprises the following steps that (1) well cleanup is conducted; (2) perforation is conducted; (3) fracturing treatment is conducted, specifically, a suspension fluid formed by mixing a prepad fluid with 140-300 mesh quartz sand is pumped at thedisplacement of 10-12 m<3>/min firstly, then a sand-carrying fluid is pumped at the displacement of 10-12 m<3>/min, 70-140 mesh quartz sand is adopted as an early-period proppant of the sand-carryingfluid, 40-70 mesh ceramsite is adopted as a later-period proppant of the sand-carrying fluid, finally, a displacing fluid is pumped for displacement, and pumping is stopped after displacement; (4) segment treatment is conducted; and (5) the steps (2) and (3) are repeated, and next segment of fracturing operation is completed. According to the fracturing technology, a microfracture and a secondaryfracture network can be effectively supported, meanwhile, a fracturing major fracture and a branched fracture are also supported advantageously, finally, effective support of the shale complex fracture network is improved overall, the yield of shale gas is increased, and the successive decreasing speed of a shale gas well is decreased.