The invention discloses a countercurrent tangential type micro turbojet engine. The countercurrent tangential type micro turbojet engine comprises a rotor system, a shell, a flame tube, a diffuser, a turbine guider, a fuel supply system, a lubricating system, a starting gas path and an exhaust system, wherein for the overall direction of the entire device, the position of the diffuser is defined as the left end direction of the entire device, the position of the turbine guider is defined as the right end direction of the entire device, by taking the rotor system as the center, the diffuser is fixed at the front end of the rotor system, the turbine guider is fixed at the right end of the rotor system, the exhaust system is positioned at the right end of the turbine guider, the flame tube is concentric with the rotor system and contains the rotor system, the fuel supply system and the starting gas path are fixed on the wall surface of the outer side of the flame tube, and the lubricating system is fixed on the outer side of the rotor system, positioned between the inner side of the flame tube and the rotor system and fixed with the shell of the micro turbojet engine through the diffuser and the turbine guider. The countercurrent tangential type micro turbojet engine reduces the pollutant discharge, and can effectively reduce the carbon deposition of the flame tube, so that the working life of the engine is prolonged.