The invention discloses a double-cyclone combustor with a primary air distribution structure; and the double-cyclone combustor consists of a fan, an outer cylinder, an ignition mechanism, an inner cylinder, a cyclone piece, an oil nozzle and an oil way. The double-cyclone combustor is characterized in that cyclone piece blades are set as an inner cyclone blade and an outer cyclone blade; an air stabilizing cylinder penetrating through the inner cylinder along the axis of the inner cylinder is arranged at the top of the inner cylinder; the outer cyclone blade coats the air stabilizing cylinder, and is connected with the outer cylinder through support legs; the inner cyclone blade is arranged in the air stabilizing cylinder; a hole is formed in the center of the inner cyclone blade; and the oil nozzle is positioned rightly above the hole of the inner cyclone blade. The double-cyclone combustor has the following beneficial effects: the fuel and air mixing effect is intensified to improve the combustion efficiency; cyclone air currents are formed in a combustion chamber to form rotating flame so as to improve the combustion stability; and the carbon formation on the wall surface of the combustion chamber is prevented.