The invention relates to technology of ferrule type pipe joints, in particular to a double-ferrule type pipe joint of a double-sealing and double-fastening support and a using method thereof. The double-ferrule type pipe joint consists of a joint body, a front ferrule, a rear ferrule and a nut; the joint body is connected with the nut by screw thread; the front ferrule and the rear front ferrule are arranged between the joint body and the nut in turn; the surface of the rear ferrule is subjected to Cr-rich ion nitrizing treatment; and the inner surface of the nut is subjected to silver plating treatment. A pipe is inserted into the joint body, the nut is screwed down by a spanner, then the nut pushes the rear ferrule to move forwards, simultaneously the rear ferrule pushes the front ferrule forwards, an inner conical hole in the joint body inwards extrudes the front ferrule so that the front ferrule eliminates the clearance between the inside diameter thereof and the outside diameter of the pipe, and a double-insurance high-strength pressure-proof sealing structure of the double-sealing and double-fastening support is formed. The double-ferrule type pipe joint has the advantages of reliable sealing property, convenient use and good repeated assembly and disassembly properties, can greatly improve the connection strength of a pipeline system, and greatly reduce the mounting moment.