Wastewater recycling system, wastewater recycling method and application in wastewater circulation in solid waste discharging area of cement production line

The invention relates to wastewater recycling, and particularly discloses a wastewater recycling system, a wastewater recycling method and application thereof. The wastewater recycling system comprises a wastewater collection unit and a settling pond; the settling pond comprises a sludge settling area and a clear water area; the wastewater collection unit can collect sewage in the wastewater discharge source area and gather the sewage to the sludge settling area, sludge in the settling pond can be gathered to the bottom of the sludge settling area, and slurry in the sludge settling area can beconveyed to a calcining furnace; and the clear water area can convey water in the clear water area to water spraying equipment and can be further controllably communicated with an external water source through a water supplementing pipeline. According to the system, wastewater in a wastewater discharge source area can be collected for cyclic utilization, sludge in the wastewater can be harmlesslydischarged, and the purpo