The utility model relates to a neutron pipe with two suppressions electrode which can suppress the voltage from generating circuit. The utility model comprises a voltage stabilizing element and a suppression resistance which are parallel connected with each other. Wherein, the one end is connected with the accelerating electrode of the neutron pipe and the negative terminal of the high-voltage power supply of the target electrode of the neutron pipe. The other end is connected with the target electrode of the neutron pipe. A voltage regulator diode, a transient surging diode, or a voltage dependent resistance which are two end voltage stabilizing element is adopted as the voltage stabilizing element. The utility model solves the problem of current technology issue, which is the circuit generated by the restrained voltage can not adjust to the multi-work condition of the neutron pipe. Regardless of the working condition of the neutron pipe and the impulse, as well as the duty ratio of the impulse, the utility model can provide unchangeable optimum restrained voltage for the suppression electrode. The utility model guarantees the good secondary electron suppression effect and suppresses the voltage from destroying the insulation between the target electrode and the accelerating electrode. Moreover, the losing of the target voltage is very small.