Diesel filter for engine fuel system

The utility model belongs to the field of engines, and particularly relates to a diesel filter for an engine fuel system, which comprises a casing, a sealing cover, a water collecting cup, an oil inlet pipe, a filter element and an oil outlet pipe. A sealing cover is installed on the top face of the shell, a water collecting cup is fixedly connected to the bottom of the shell, the bottom face of the water collecting cup is communicated with an oil inlet pipe, a filter element is installed in the shell in a sliding mode, the middle of the top face of the filter element is communicated with an oil outlet pipe, and the oil outlet pipe penetrates through the middle of the sealing cover in a sliding mode. Engine oil is added into the shell through the oil inlet pipe, harmful particles and water in the engine oil are filtered by the filter element, and the filtered engine oil penetrates through the filter element and is discharged through the oil outlet pipe, so that an oil nozzle of an oil pump, a cylinder sleeve,