The utility model discloses a three -dimensional parallel -plate sensor, including three parallel plate electrode of group, every parallel plate electrode of group comprises two circular polar plates, and six circular polar plates become regular hexahedron shape and arrange that the electrode of each circular polar plate is qualified for the next round of competitions and is located the central part of circular polar plate, still including packing the insulator of well kenozooecium in order to support and to keep apart six circular polar plates between six circular polar plates. The utility model discloses three -dimensional parallel -plate sensor, for one -dimensional or two -dimensional direction's electric field measuring transducer, its measuring result receives to influence from the orientation in the electric field forer a short time, and it is higher to detect accuracy and stability, and this three -dimensional parallel -plate sensor, for one -dimensional or two -dimensional direction's electric field measuring transducer, it is changeed in calculating the relation of its surface charge with the electric field, can reflect measuring point electric field strength's size more accurately, and this three -dimensional parallel -plate sensor, its structure and preparation simple process, manufacturing cost is lower.