The invention relates to a
pool with a multi-layer structure and a building method of the
pool. The bottom of the
pool is arranged under the ground, a part which extends from the highest place of an excavation side of a side wall of the pool to the ground at one non-excavation side is provided with a top press region; an underground
water discharge layer is arranged under the bottom surface of the pool, and a base
cushion layer, a seepage-proof layer and a protecting layer, which are connected with one another into a whole, are sequentially arranged on the underground
water discharge layer, the excavation side of the side wall of the pool and the top press region; and a ring-shaped underground
water discharge blind drain is arranged under the underground water
discharge layer along the lowest place of the excavation side of the side wall of the pool, at least one linear underground water
discharge blind drain is arranged under the excavation side at the bottom of the pool, two ends of the linear underground water
discharge blind drains are communicated with the ring-shaped underground water discharge blind drain, and a water outlet of the ring-shaped underground water discharge blind drain is connected with an underground water discharge
pipe. The pool is ingenious in conception, is resalable in design, and has the advantages of being high in foundation deformation resistance, high in stability, good in water-storing and seepage-proof effect, low in project cost, long in the facility service life, wide in application range, simple in construction and the like.