This invention relates to a supercritical pressure steam injection boiler including the burner, the hearth, the flue and the water supply pipe. The first and second radiant tube bundles are positioned inside the hearth, the first and second convection tube bundles are positioned inside the flue, the water supply pipe is connected to the shell side input of the heat exchanger, the shell side output of the heat exchanger is connected to the input of the first convection tube bundle via the first pipeline, the output of the first convection tube bundle is connected to the input of the first radiant tube bundle via the second pipeline, the third pipeline connects the output of the first radiant tube bundle and the tube side input of the heat exchanger, the forth pipeline connects the tube side output and the input of the second radiant tube bundle, the fifth pipeline connects the output of the second convection tube bundle, and the output of the second convection is connected to the steam discharge pipe. This invention moves the steam terminal heating tube bundle from the radiant section to the convection section, which avoids heat transfer deterioration, increases the steam pressure to 26MPa and solves the exploitation problem in high pressure deep block and super heavy oil block.