Double-core water-saving reverse osmosis water purifier

A double-core water-saving reverse osmosis water purifier comprises a reverse osmosis water purifier body, a wastewater recycle water tank and a wastewater filter device. A wastewater inlet and a water overflow opening are arranged at the upper end of the wastewater recycle water tank, a wastewater outlet is arranged at the lower end of the wastewater recycle water tank, the wastewater inlet is communicated with a reverse osmosis wastewater drainage pipe of the reverse osmosis water purifier body, the water overflow opening is communicated with the water overflow drainage pipe, the wastewater outlet is communicated with the wastewater filter device through a wastewater outlet pipe, the wastewater filter device comprises a wastewater booster pump communicated with the wastewater outlet pipe and an ultrafiltration membrane water purifying assembly communicated with the other end of the wastewater booster pump, and a wastewater drainage pipe and a clean water outlet pipe are arranged on the ultrafiltration membrane water purifying assembly. The double-core water-saving reverse osmosis water purifier greatly lowers water-source waste in reverse osmosis water purifying process, and has huge social benefits.