Dry soil screening device

The utility model discloses a dry soil screening device which comprises a round box, round sieves and sieve holes, and further comprises inserting lugs, inserting lug grooves and inserting bolts, the round sieves are sequentially stacked on the top of the round box, the sieve holes are formed in the bottoms in the round sieves at equal intervals, the inserting lugs integrated with the round sieves are arranged on the two sides of the bottoms of the round sieves respectively, and the inserting lugs are inserted into the inserting lug grooves. The two sides of the top of the round box and the two sides of the top of the round screen are each provided with an insertion lug groove corresponding to the insertion lug. A set of mechanism for separating and screening particles of a soil sample is provided for soil sample detection personnel, an existing soil sample separation sieve is optimized, so that separation sieves can be integrally disassembled and assembled, circular sieves cannot be separated and fall off wh