The utility model provides a comprehensive pipe gallery space release system capable of improving the space utilization rate. The comprehensive pipe gallery space release system has good practical value and promotional value. According to the technical scheme, the comprehensive pipe gallery comprises a comprehensive pipe gallery body. Concrete buttresses are installed on a bottom plate of the comprehensive pipe gallery. An arc-shaped notch is formed in the upper end of the concrete buttress; a water feeding pipeline is installed in the arc-shaped notch of the concrete buttress, a reclaimed water pipeline is inserted into the concrete buttress in a penetrating mode, an energy dissipation cushion block is arranged between the water feeding pipeline and the reclaimed water pipeline, the energy dissipation cushion block is arranged at the joint of the pipelines, arc-shaped grooves are formed in the upper end face and the lower end face of the energy dissipation cushion block respectively,and damping layers are arranged in the arc-shaped grooves. Materials are convenient to obtain, cost is low, construction is simple, and popularization is easy.