Waterlogging-preventing drainage system for gardens

The invention discloses a waterlogging-preventing drainage system for gardens and relates to the technical field of garden drainage. Comprising a soil layer, a filter material layer, a water seepage sand layer and a gravel layer which are sequentially connected from top to bottom, a water collecting pipe is arranged in the gravel layer and communicated with a water storage tank, a water supply tank is arranged at the top of the water storage tank and connected with the water storage tank through a water pumping device, and the water supply tank is connected with a plurality of irrigation pipes. The irrigation pipes are distributed in the soil layer. According to the waterlogging-preventing drainage system for the garden, through cooperation of the multiple water-permeable boundary layers, impurities of water can be preliminarily purified, the overall quality of collected water is improved, the situation of drainage blockage is reduced, drainage can be effectively conducted, flood is avoided, vegetation is pre