The invention discloses a combined ion testing electrode device and belongs to the technical field of ion testing electrode devices. The technical key point of the device is that: the ion testing electrode device comprises an electrode connecting base, an instrument connector connected with the electrode connecting base through a circuit, and a testing electrode which is movably connected with the electrode connecting base; at least one electrode jack is formed on an end face of the electrode connecting base; the electrode jack and the instrument connector are in one-to-one correspondence and are connected with each other through a circuit; the testing electrode comprises an electrode pipe, electrolyte arranged inside the electrode pipe, an electrode film arranged on an end part of the electrode pipe, and a connecting plug which is arranged at the other end of the electrode pipe and adapts to the electrode jack; and the testing electrode and the electrode connecting base are connected through matched plugging of the connecting plug and the electrode jack. The invention aims to provide a combined ion testing electrode with the advantages of simple structure, convenient use and capacity of manufacturing the electrode pipe and other components into mutually independent parts. The combined ion testing electrode is used for an ion testing electrode.