The invention discloses a technical method of a safe and covert high-capacity oil depot arranged underground. The safe and covert high-capacity oil depot arranged underground is characterized in that the oil depot is built in mines to be wasted or abandoned mines or idle tunnels, caves,
cave dwellings and culverts. The oil depot is composed of a plurality of nonstandard single storage tanks, wherein the storage tanks are connected through pipelines, and tube valves are mutually communicated and isolated. An oil inlet tube and an oil outlet tube are respectively installed on the upper portion and the lower portion of a tank body and connected with an oil inlet and outlet main tube, the oil inlet tube and the oil outlet tube extend to the ground to be connected with an oil
discharge device, and a buffer pump and an
oil well pump are installed on the main tube. Inflaming retarding isolation protective screens are arranged among the storage tanks, and a
pedestrian path is arranged on the side. Ventilation equipment,
fire control equipment, lighting equipment and
dewatering equipment are installed in the depot, and a camera shooting monitoring instrument and a gas automatic detecting instrument are installed. The safe and covert high-capacity oil depot arranged underground has functions of
fire protection,
thunder prevention, war prevention and man-made sabotage prevention, solves the problem that the prior art is large in
land occupation, high in construction and operational cost, small in storage content, multiple in
environmental factor influence, poor in elusive performance and poor in safety and reliability, and has safety risks on the periphery.