Sealing structure for filter cleaner of diesel engine

The invention provides a sealing structure for a filter cleaner of a diesel engine. The sealing structure comprises a filter cleaner body, wherein a rubber ring mounting slot is formed in the filter cleaner body; and the section of a rubber ring of the rubber ring mounting slot is a trapezoidal structure which is narrow in top and wide in bottom. Compared with the prior art, the sealing structure has the advantages that: firstly, the rubber ring with a rectangular section is reconstructed into the rubber ring with the trapezoidal section for reducing a contact surface area between the rubber ring and a filter seat, so that pressure intensity is improved, and pressure borne on the rubber ring is improved; and secondly, the structure of the mounting slot in the filter seat is not required to change and only the structure of the rubber ring is improved, so that the cost can be reduced, and the processing is easy.