The invention provides a large-length and high-temperature resisting loaded detection cable, which is characterized in that a single-mode or a multi-mode tight coated fiber (1) is used as an inner core to cover a tight coated insulation layer (2), a braided copper wire layer (3), an inner sleeve layer (4), a closed water-proofing metal pipe (5), an outer sleeve layer (6) and an inner and an outer loaded twisted steel wire layers (7,8) in sequence from the inside to the outside The number of the cores of the tight coated fiber (1) can be one or more, the copper wire of the braided copper wire layer (3) can be of a single layer or multi-layer tinned copper wire or silver-coated copper wire, the closed water-proofing metal pipe (5) is stainless steel pipe, copper pipe, aluminum pipe or other metal pipes with good conductance, the insulation materials of the tight coated insulation layer (2), the inner sleeve layer (4) and the outer sleeve layer (6) are Fluor plastic or nylon, the steel wires of the inner and the outer loaded twisted steel wire layers (7,8) are double-layer or multi-layer stainless, galvanized or nickel-plated. The invention is widely applicable to geologic exploration of the land and the seabed, strata oil-gas field and the transmission detection of the transmission and detection signals for water conservancy and hydrology. The invention has the advantages of good water-proofing, high-temperature resistance, wear resistance, long service life, high bandwidth of the transmitted detection signals with less loss.