Base structure for cleaning machine and cleaning machine

According to the base structure for the cleaning machine and the cleaning machine, a base body is installed at the bottom of a machine body of the cleaning machine and is provided with an installation section with an upward opening for installing elements of the cleaning machine, and an installation groove extending in the left-right direction is formed in the rear side of the installation section. The at least two balance weight units are arranged in the mounting groove in the rear side of the seat body, so that the balance weight piece can be flexibly assembled in the mounting groove in the mode that the balance weight units are connected in sequence according to use requirements, and compared with existing screw locking and combination of the balance weight units, the balance weight piece is more convenient to assemble and disassemble. According to the balance weight assembly, the two adjacent balance weight pieces can be mutually extruded during assembly to form mutual limiting, the balance weight units a