The invention discloses an oxygen candle which comprises an absorption inflammable layer, a heating layer and a main candle layer, wherein the heating layer is arranged between the absorption inflammable layer and the main candle layer; the main candle layer consists of the following components in percentage by mass: 90-96% of chlorate, 1.5-5% of a catalyst, 0-3% of fuel, 1.5-2.5% of an adhesive and 0.5-1.5% of a stabilizing agent; the heating layer consists of the following components in percentage by mass: 70-80% of chlorate, 5-15% of a catalyst, 5-12% of fuel and 3.0-6.0% of an adhesive; the absorption inflammable layer consists of the following components in percentage by mass: 5-15% of fuel, 80-90% of barium chromate, 3-5% of an adhesive and 0-1% of chlorate. By adjusting the types and ratios of the catalysts, the decomposition temperature of an oxygen generation agent, namely the chlorate, is reduced, oxygen can be relatively easily released under a low temperature condition, then the amount of elegant metals in the absorption inflammable layer is reduced, and meanwhile due to addition of a flame retardant, the release velocity of energy of the elegant metals is controlled.