The invention discloses a low-dam high-net swimming crab cultivation water storage pond having a self-discharging function. A water storage pond space is constructed according to characteristics of swimming crabs, the rectangular water storage pond is formed by being surrounded by a pond dyke built on a beach, the upper end and the lower end of the water storage pond are arranged in the same direction as the tiding direction, an annular ditch is disposed between the periphery of a beach face and the pond dyke, the pond dyke at the upper end and / or the lower end of the water storage pond is provided with an overflow dam, and the beach face is internally at least provided with one middle ditch in the same as the tiding direction. The water storage pond comprises an ingestion site, an inhabiting site and a hibernating site, pollution discharge is performed by utilizing tidal energy, an all-dimensional ecological environment space for inhabitation, oversummer and overwintering and the like of the swimming crabs in a juvenile crab bearing period, a growth period, a mating period and a fattening period, an energy-saving self-discharging ecosystem is formed, various beach resources and natural energy are fully utilized, cannibalism is reduced, diseases are prevented, the survival rate is improved, the quality and yield are improved, and the ecological cultivation and healthy development of the beach are promoted.