The invention discloses low-volatility double-cross-linking heat-conducting phase-change gel, which is characterized by comprising the following components in parts by weight: 1-30 parts of a resin A, 0.01-5 parts of a curing agent, 1-10 parts of a phase-change material, 0.1-2 parts of an antioxidant, 1-30 parts of a resin B, 0.01-5 parts of a cross-linking agent, 0.01-1 part of a catalyst and 100-300 parts of a heat-conducting filler. According to the invention, on the basis of silicone rubber and filler of original heat-conducting gel, an additional cross-linking curing system is introduced to achieve double-network cross-linking, and silicone rubber of different networks has a mutual dragging effect, so that volatilization of small molecules can be inhibited while it is guaranteed that the extrusion rate of the heat-conducting gel is high; a curing system of peroxide and silicone rubber is adopted, after a manufacturer completes curing to a certain degree, the product is made to be used at a client side, and the residual peroxide can still promote curing; and the phase change substance is introduced, and after phase change, the viscosity of the system is reduced, so that curing is promoted, the curing degree is improved, and volatilization of small molecules is further inhibited.