The utility model discloses a two-joint automatic backwashing high-precision filter which automatically backwashes filter elements by using self-pressure force. One head of each filter element is opened. A cylinder is divided into two sections. Exporting liquid is completely isolated from a drive axle. Importing liquid is isolated from the exporting liquid. The liquid must be filtered by the filtering element, and then can reach a water outlet. Thus, the exporting liquid can not be polluted. A dirt discharging tube is arranged on the bottom of the filter and can be periodically opened for effectively discharging the settled dirt, and thus, the filtration efficiency is increased. The axial lead of a water inlet and the axial lead of the water outlet can be optionally arranged in various directions. The utility model has the advantages of reasonable design, compact structure, low cost, energy saving and beautiful appearance. The two-joint automatic backwashing high-precision filter is suitable for rough and precise filtration of various liquids. The utility model provides a high-tech energy saving and environment protecting product with a very wide application area, which can be compared with oversea products in the same type. A Chinese language friendly interface microcomputer control system can display the overall processing of backwashing.