The utility model discloses a LXS type spiral sieve, including a first sieve section of thick bamboo and a second sieve section of thick bamboo, the pan feeding mouth has been seted up to the upper left side of a first sieve section of thick bamboo, first sieve section of thick bamboo inboard is provided with a first storage section of thick bamboo, first sieve has been erect to first storage section of thick bamboo inboard, the first sieve left and right sides is fixed through the first board that erects, the first intralamellar part that erects is connected with first roller, the first roller outside is fixed with first spiral sword, the first sieve section of thick bamboo left and right sides is fixed with the fixing base, the fixing base passes through fixing bolt and the first sieve section of thick bamboo left and right sides is fixed, second sieve section of thick bamboo inboard is provided with a second storage section of thick bamboo, the second sieve has been erect to second storage section of thick bamboo inboard, this kind of LXS type spiral sieve, and simple structure, reasonable in design, sealed effectual, the difficult sieve mesh that blocks up can carry out effectual screening to the material through setting up two -layer spiral sieve, and through setting up the air -blower, the purity of assurance mineral aggregate that can be better has fine practicality.