Evaporation and three-dimensional crystallization salt lake lithium extraction system and method

The invention discloses an evaporation and three-dimensional crystallization salt lake lithium extraction system and method, relates to the field of lithium extraction processes, and can solve the problems of low quality and yield of lithium carbonate extracted by a precipitation method in the prior art. The salt lake lithium extraction system comprises an original brine pool, a plurality of evaporation pools, a finished brine storage pool and a crystallization pool, the original brine pool, the plurality of evaporation pools, the finished brine storage pool and the crystallization pool are sequentially connected, the plurality of evaporation pools are sequentially connected from the original brine pool to the finished brine storage pool, the original brine pool is used for storing brine extracted from a salt lake, and the crystallization pool is used for crystallizing the brine extracted from the salt lake. The brine storage tank is used for storing brine and discharging the stored brine to the plurality of