Abstract: The rotary vane engine of this invention includes a housing and a rotor. The housing is formed by a stator and front and rear covers. The rotor comprises hollow vanes set up in an inner space of the housing. The wall of the inner space and peripheral wall of the rotor consists of two pairs of symmetric intake-compression chambers and power-exhaust chambers. The volume of the power-exhaust chamber is larger than the intake-compression chamber. An inlet is mounted in the wall of the stator in the beginning of the intake-compression chamber and an outlet is mounted in the wall of the stator in the end of said power-exhaust chamber. In the upper and lower ends of the stator, there are two symmetric cylinders, there is a combustor consisting of separated combustion chambers in the cylinders respectively. In the wall of the cylinders, there are compressed gas channels and combustion gas nozzles coupled with the inner space.