The invention provides two-component condensation-type thermal-conductive silicone gel and a preparation method thereof. The silicone gel comprises an A component and a B components; the A component comprises the following raw materials, in parts by weight: 35-60 parts of alpha,omega-dihydroxy polydimethylsiloxane, 40-60 parts of silicon micropowder, 0.5-5 parts of a zinc-containing compound, and 0.03-0.1 part of a catalyst; and the B component comprises the following raw materials, in parts by weight: 30-55 parts of alkoxy-terminated polydimethylsiloxane, 40-60 parts of silicon micropowder, 2-10 parts of a cross-linking agent, and 1-5 parts of a coupling agent. According to the silicone gel provided by the invention, the zinc-containing compound is used in the formula, so that deep curing of the silicone gel is realized, and has better comprehensive performance than gel prepared by adding water, precipitated white carbon and glycerol organic phosphate; and the thermal conductive silicone gel has not high requirements for measurement accuracy of mixing equipment and simple and convenient operation during use, the stable performance of the silica gel after being mixed is ensured, and the thermal conductive silicone gel is suitable for continuous mass production in an automatic line.