Double-spindle structure with replaceable cutter

The utility model relates to the technical field of parts and accessories of cleaning machines or equipment, in particular to a double-main-shaft structure with a replaceable cutter, which comprises agear box provided with two through holes; the two main shaft assemblies are respectively sleeved on the two through holes in the gear box, the top ends of the main shaft assemblies are connected withrotary joints, and the bottoms of the main shafts are used for clamping knife handles; gear with two bevel sets, the first bevel gear set penetrates through the gearbox and is connected with the second bevel gear set; the left side and the right side of the second bevel gear set are connected with a first transmission gear set and a second transmission gear set respectively. The first transmission gear set and the second transmission gear set are connected with the first driven gear set and the second driven gear set respectively, the first driven gear set and the second driven gear set are installed on the main shaft