Water purifier

The utility model provides a water purifier and relates to the technical field of water purification. The water purifier comprises a reverse osmosis filter element and a direct-current power supply, the direct-current power supply comprises a positive electrode and a negative electrode, and the positive electrode and the negative electrode are respectively connected with the reverse osmosis filter element; when the direct-current power supply is electrified, an electric field can be generated in the reverse osmosis filter element. According to the water purifier disclosed by the utility model, the resistance of positive and negative ions on the raw water side of the reverse osmosis membrane to permeate through the reverse osmosis membrane is increased, the probability that the positive and negative ions permeate through the reverse osmosis membrane is reduced, and the TDS value on the pure water side is reduced, so that the TDS value of the first cup of water is reduced. Meanwhile, the reverse osmosis membran