Composite underground anti-seepage isolation wall structure and construction method

The invention discloses a composite underground anti-seepage isolation wall structure and a construction method. The composite underground anti-seepage isolation wall structure comprises a vertically-arranged wall and at least two functional layers arranged in the wall and made of different materials. The arranging direction of the functional layers is parallel to the wall, and at least one functional layer is in a plate shape. The construction method based on the above composite underground anti-seepage isolation wall structure comprises the following steps that a, the position where the anti-seepage isolation wall needs to be arranged is excavated to form a groove, wall materials are injected into the groove, and a functional layer platy material is inserted in the wall materials; b, theplaty material is inserted to the design elevation; c, a second platy material is inserted side by side, the two platy materials are connected through a buckle so that the joint sealing quality can be ensured, and percolate