Filter assembly and air purifier

The utility model provides a filter assembly and an air purifier, relates to the field of air purification, and solves the problem that the air purification effect of a filter screen is poor. The filter assembly comprises a fixed frame, an electrostatic dust collection part and a power supply box, the electrostatic dust collection part is fixed in the fixed frame and comprises a net rack, positive plates and negative plates, all the positive plates are electrically connected with a positive electrode in the power supply box, all the negative plates are electrically connected with a negative electrode in the power supply box, and the fixed frame is grounded; the positive plates and the negative plates are alternately arranged in the net rack, the adjacent positive plates and negative plates are arranged at intervals, and circulation gaps allowing airflow to pass through are formed; the power box provides direct-current voltage to the positive plate and the negative plate, a high-voltage electric field is forme