The invention discloses a porous heating element, a manufacturing method, and a combustor installed with heating element. The heating element is a powder metallurgy integrated structural member, and abent hole channel penetrating up and down is arranged on the heating element. The hole channel comprises multiple bending parts in the length direction; the bending directions of adjacent bending parts on one same hole channel are opposite; and the bending parts are connected in a smooth transition way. The porous heating element provided by the invention not only can be beneficial to greatly improving the combustion stability and has a good anti-backfire function, but also is simple in process, high in manufacturing accuracy, low in manufacturing cost, and suitable for standardized mass production.