The utility model provides a sieving mechanism and intelligent detritus drag for machine of washing relates to oil drilling geological logging technical field, including the crossbeam, the crossbeam bottom is connected with the water receiving tank, on the crossbeam, the direction that deviates from the water receiving tank is equipped with the support, on the support, be equipped with upper shale shaker, middle level shale shaker and bottom shale shaker along detritus whereabouts direction spaced in proper order, the bottom of upper strata shale shaker, middle level shale shaker and bottom shale shaker all is equipped with the screen cloth, is equipped with the pan feeding mouth on the upper shale shaker, and middle level shale shaker top is equipped with the first opening that is used for receiving the detritus that leaks down from upper shale shaker, is equipped with the discharge gate on the shale shaker of middle level, and bottom shale shaker top is equipped with the second opening, be equipped with vibrating device on the crossbeam. The use includes the utility model provides an intelligent detritus of sieving mechanism drags for the machine washed and drags for the detritus and wash, and the high efficiency is retrencied to device, drags for that to wash the process simple and convenient, screening that can be accurate, collects suitable detritus, the detritus high quality of collection, and discern and oil surveying provides more accurate research data for geology.