The crossover screen brings about the "dynamic sieve" screening mode, which solves the problem of world-class wet coal viscosity blocking that has plagued the screening industry for many years. The cross-screening has brought about "material self-cleaning," making complex mechanical cleaning devices available. Dispensable; the cross screen redefines the consumable parts of the screening machine, allowing the screen-like wearing parts for a few months of life to rest on the long-life durable screens; the cross screen changes people’s understanding of the reliability of boiler auxiliary machines. It is also bound to change people's expectation for the trouble-free operation cycle of circulating fluidized bed boilers. Cross-screening creates wet coal viscous screening records and starts and leads the era of efficient screening.