Water purifier with ozone sterilization function

The utility model discloses a water purifier with an ozone sterilization function. The water purifier comprises a pre-filter (1), an ultrafiltration water purifier (3), a water storage tank (4), an ozone generator (5), an active carbon tank (9) and a buffering water tank (12), wherein the pre-filter (1) is connected with the ultrafiltration water purifier (3) and the water storage tank (4) in sequence; a magnetizer (2) is arranged on an ultrafiltration water inlet pipe (22); an electronic flowmeter sensor (11) is arranged on a purified water outlet pipe (25); one end of a back washing water inlet pipe (23) is connected with the ultrafiltration water inlet pipe (22) between the pre-filter (1) and the magnetizer (2), and the other end of the back washing water inlet pipe (23) is connected with the purified water outlet pipe (25); the water storage tank (4) is connected with a booster water pump (6), an ozone injector (7), a mixer (8) and a one-way valve (10) in sequence and then the one-way valve (10) is connec