The power control of ADS subcritical reactor is essentially different from that of the critical reactor. The control rod is mostly used as the control means of the critical reactor to adjust power,while the control rod and external neutron source are used as the control means of the ADS subcritical reactor to regulate the power. Therefore,the control of the ADS system is more complex and special. And it is necessary to determine the control strategy of the ADS subcritical reactor. The reactivity of the control rod and the strength of the external neutron source are set as controlled objects si...