The invention provides a both-way combustor. The both-way combustor comprises a combustion disc, a combustion frame and a fire distribution disc. Two outer ring air inlet channels are arranged in the axis direction of the combustion disc in a central symmetry manner. An inner ring air inlet channel is arranged between the two outer ring air inlet channels. The combustion frame is located on one side of the combustion disc. A first outer ring air inlet part is arranged at one end of the combustion frame, and a second outer ring air inlet part and an inner ring air inlet part are arranged at the other end of the combustion frame. The fire distribution disc comprises an outer ring fire disc and an inner ring fire disc which are embedded in the other side of the combustion disc and are concentrically arranged. The combustion disc and the combustion frame are made of aluminum alloys, and the fire distribution disc is made of magnesium alloys. The both-way combustor is provided with the two outer ring air inlet channels in central symmetry and one inner ring air inlet channel, gas enters an outer ring groove in a vortex manner, the flame strength of the outer ring fire disc embedded in the outer ring groove is improved, the time for igniting the flame on the outer ring fire disc is shortened, and efficiency is improved.