A highly-reliable time delay circuit distributor comprises a power module, a power supply control module, a highly-reliable time delay circuit distributing module, a signal collecting module and an input/output interface. An aircraft battery or a ground power can output direct-current power to the power module of the distributor through the input/output interface, the highly-reliable time delay circuit distributing module is driven after receiving a power distributing instruction sent by the power supply control module, the highly-reliable time delay circuit distributing module can achieve power distribution of all accesses through a power distribution control circuit and a power supply circuit according to the power distributing instruction, and the signal collecting module can collect voltages of all power distributing accesses in real time and output the collected voltages through the input/output interface. The highly-reliable time delay circuit distributor has the advantages of guaranteeing the double-relay double-contact redundant design, improving the reliability, reducing relay power consumption and saving equipment cost and equipment space.