The utility model discloses a base subassembly in automatic cleaning filter, including base, be equipped with the open slot for installing filter cylinder subassembly in the middle of base, be equipped with the outer installation groove and the inner installation groove of the concentricity setting in the open slot, the shell of filter cylinder subassembly is fixedly connected with base through the outer installation groove, the first filter skeleton of filter cylinder subassembly is fixedly connected with base through the inner installation groove, be equipped with the through -hole for installing motor subassembly in the open slot, and the output of motor subassembly passes through the through -hole and is connected with the second filter skeleton of filter cylinder subassembly, be equipped with liquid inlet and blowdown in the side of base, and liquid inlet and blowdown all are linked together with the open slot. The utility model discloses through base integration filter cylinder installation, motor fixed and fluid passage function, utilize the concentricity installation groove and promote positioning accuracy, and optimize modular installation through
standardization interface design, has the advantages such as improving structure integration, enhancing positioning accuracy and optimizing
modular design.