The utility model relates to a highly reliable intermediate frequency cable towards multiple extreme environments, including cable and connector, the cable includes one signal line, three -strand three -phase output power supply line, one ground wire, the one signal line is placed in the cable center, and three -strand three -phase output power supply line is arranged in the symmetry all around of signal line with the one ground wire, be covered with the multilayer crust at three -phase output power supply line and ground wire outsourcing, the connector is installed at the both ends of cable, carries out in the hood the sealed processing with the outer coating high temperature putty of hood of encapsulating to the connector, can use at multiple extreme environments.