The invention discloses a field two-way interphone with a positioning function, which relates to the technical field of interphones and comprises a bottom plate, an interphone waterproof protection unit, an interphone body fastening unit and a fixing unit. The bottom plate is rectangular; the interphone waterproof protection unit comprises a protection box, an interphone body, a positioning module, a rectangular sealing cover, a rotating shaft, a supporting lug, a movable block, a first fixing block, a screw rod, a second fixing block and a threaded hole, the side face of the bottom plate is fixedly connected with the side face of the protection box, and the inner bottom face of the protection box is in friction connection with the lower surface of the interphone body. And the middle part of the side surface of the interphone body is fixedly connected with the side surface of the positioning module. When severe weather such as rainy days is encountered in the field, the interphone can be subjected to waterproof protection, so that the interphone cannot be in direct contact with water, the situation that the interphone cannot be conveniently contacted with other people due to the fact that the interphone is damaged by water is avoided, the interphone can be conveniently fixed on clothes, and great convenience is brought to use.