Double-layer structure ground mat

The utility model provides a double-layer structure ground mat. The double-layer structure ground mat comprises an upper layer structure, a lower layer structure and a combining part; the upper layer structure and the lower structure are mutually overlapped; the upper layer structure and the lower layer structure comprise a plurality of plastic strips which are arranged in an interval mode; the plastic strips are long plastic strips with the cross section to be fixed in shape; long sides of the plastic strips are provided with drainage grooves; the drainage grooves are through the plastic strips; the direction of opening portions of the plastic strips is identical to that of an opening portion of the combining part, then the combining part is connected with upper structures of two ground mats; if the direction of the opening portions of the drainage grooves is opposite to that of the combining part, then the combining part is connected with the upper layer structure of one ground mat and the lower layer structure of the other ground mat.