Basket filter is mainly composed of nozzle, supervisor, filter blue, flange, flange cover and fastener. When the liquid enters the filter blue through the main pipe, the solid impurity particles are blocked in the filter blue, while the clean fluid is discharged through the filter basket and the outlet of the filter. When cleaning is needed, unscrew the bottom bolt of the main pipe, drain the fluid, remove the flange cover, and re-load after cleaning. Therefore, it is very convenient to use and maintain.