The invention relates to a fracturing fracture-forming technique and a fracturing fracture-forming method for shale. The fracturing fracture-forming method comprises the following steps: I, arranging a shale well and a pump set on the ground, wherein the shale well comprises a shaft, a shaft wall, a shaft bottom and a horizontal shaft section; an overlying rock layer and a target layer are arranged on the outer side of the shaft wall; a conveying pipeline is arranged in the shale well; a packer is connected to the other end of the conveying pipeline; a perforation channel is formed in the outer wall of the horizontal shaft section; II, arranging a microwave generation device on the ground, arranging a microwave transmission line in the shale well, arranging a pipeline column on the outer side of the transmission line, and enabling a microwave receiving device to be connected to one end of the microwave transmission line; III, arranging the pump set on the ground, arranging the conveying pipeline in the shale wheel, and arranging a ball actuated sliding sleeve structure on the conveying pipeline. By adopting the fracturing fracture-forming technique and the fracturing fracture-forming method for shale, the problem that the cost of fracturing fluid is high in the fracturing process can be solved, and meanwhile, by using a method of microwave heating in combination with liquid nitrogen cooling, the problem that a seepage channel is blocked by water-locking as liquid phase near a well pore is relatively slow in volatilization speed due to the fact that the pressure difference is too small is solved.