The invention provides an ion receiving device which comprises a metal pole piece (1), an insulating layer (2) and a metal shielding layer (3). The ion receiving device is characterized in that holes are formed in the metal pole piece (1); airflow passes through the holes; the outer side of the metal pole piece (1) is joined with the insulating layer (2); and the metal shielding layer (3) is arranged on the outer side of the insulating layer (2). The ion receiving device has the characteristics and the beneficial effects that as a plurality of small holes are formed in a receiving pole plate, and airflow passes through the holes, ions can be received within an airflow field, the phenomenon that the airflow is instable due to the fact that the ions are received by using one metal piece and the airflow flows from the side wall of the metal piece at present, is overcome; the pole piece is divided into a plurality of small pole pieces, so that airflow becomes relatively stable after flowing through the receiving pole piece; and the ion receiving device has the characteristic of being simple in structure, stable in airflow and high in ion receiving efficiency.