The invention relates to a sand screen, in particular to a classifying sand screen. The classifying sand screen comprises a base body, a first screen mesh, an initial collecting hopper, an oscillating part, a slow falling mechanism, a braking part, a transmission part, a dividing hopper, a shifter and a rack, wherein single-layer sand stone is conveyed to the first screen mesh through buffering and dividing the added sand stone through the initial collecting hopper in combination with vibration, so that the noise is lowered, the service life of the first screen mesh is prolonged, and the screening efficiency is increased; through the alternate lifting of two baffle plates, the single-layer sand stone is blocked in sections, the screening time is prolonged, the length of the first screen mesh is reduced, and the screening efficiency can also be increased; an arc frame and an second screen mesh swinging back and forth obliquely can increase the stroke of sand screening movement, the length of the second screen mesh is reduced, and the screening efficiency of coarse sand and fine sand can be improved; according to the classifying sand screen, the screening of stones, coarse sand and fine sand can be completed through the short screening nets and the two-layer screening structure, filling is easy due to the fact that the height is low, the occupied area of the classifying sand screen is small, and the screening efficiency is high.