The invention discloses a wide-net fracturing method for shale gas exploitation. The wide-net fracturing method comprises the following steps: according to seismic data, geological data, logging data, gas pool data and rock mechanics data, structuring a geological model and establishing a rock seepage-stress-damage coupling model; according to the requirement of the rock seepage-stress-damage coupling model, modeling a pre-fracturing initial stress field to obtain a stress field model; according to the geological model and the stress field model, obtaining a gas pool numerical model of a research object, and coupling the geological model, the gas pool numerical model and the rock seepage-stress-damage coupling model to obtain a geological model-numerical model-FSD coupling model; according to the geological model-numerical model-FSD coupling model, confirming perforation parameters, service well sections and gas production profiles of a shale gas horizontal well; according to the confirmed perforation parameters, service well sections and gas production profiles, carrying out wide-net crack fracturing. According to the method, perforation and balanced gas production can be matched and optimized, all perforation clusters are subjected to liquid inlet to form effective cracks, and the yield of shale gas is improved.