The XLP type cyclone dust collector is a high-efficiency cyclone dust collector with a bypass channel on the outside of the cyclone cylinder body. It can make a part of the gas containing more dust near the inner wall of the cylinder pass through the bypass into the lower part of the cyclone barrel to reduce the dust from being discharged, especially for dusts larger than 5μm, has a higher dust removal efficiency. It is used to remove dense non-fibrous and cohesive dust from industrial exhaust gases. It can effectively separate tobacco ash, talcum powder, quartz powder, limestone powder, slag cement, cement raw material, etc. It has the characteristics of simple structure, convenient operation, high temperature resistance, low resistance and high dust removal efficiency. It is suitable for mining, metallurgy and fire-resistant Gas purification in industrial sectors such as materials, coal, chemicals, building materials and electricity.