Layered sampler for underground water

The utility model relates to a layered sampler for underground water. The layered sampler is characterized by being provided with a conduit (2), wherein a floral tube (4) with a water permeating hole (3) is arranged on the conduit (2); an upper-layer connecting tray and a lower-layer connecting tray are respectively arranged at the upper end and the lower end of the floral tube (4); the upper-layer connecting tray comprises an upper-layer upper tray (5) and an upper-layer lower tray (6); the lower-layer connecting tray comprises a lower-layer upper tray (7) and a lower-layer lower tray (8); the upper-layer upper tray (5), the upper-layer lower tray (6) and the lower-layer upper tray (7) are respectively provided with an upper-layer upper tray ventilating hole (9), an upper-layer lower tray ventilating hole (10) and a lower-layer upper tray ventilating hole (11); a charging connector (12) is arranged on the upper-layer upper tray (5); the upper-layer lower tray ventilating hole (10) and the lower-layer upper tray ventilating hole (11) are connected together by a connecting air pipe (15); the charging connector (12) is connected with a charging pipe (16); an upper charging capsule and a lower charging capsule can be filled with gas or water by using an air pump or a water pump; and a sampling pipe (17) is arranged in the conduit (2). The layered sampler has a simple structure and is convenient to use; and the layered sampling of the underground water can be realized.