The invention discloses an intelligent out-of-control protection system for a rotary wing type unmanned aerial vehicle. The intelligent out-of-control protection system comprises the following equipment of a power source, an attitude sensor, a height sensor, a control chip, a first steering engine, a second steering engine, a shock absorption autoinflation air cushion, a catapult and a self-throwing type parachute, wherein the power source is used for supplying power to the control chip, the attitude sensor, the height sensor, the first steering engine, the second steering engine and the catapult; the attitude sensor and the height sensor are used for acquiring attitude data and height data of the rotary wing type unmanned aerial vehicle and sending the attitude data and the height data to the control chip; the control chip is used for analyzing the attitude data and the height data and sending out a control signal to the first steering engine and the second steering engine; the first steering engine is used for controlling the catapult to be started and stopped; the second steering engine is used for controlling an autoinflation device to inflate air into the shock absorption autoinflation air cushion; the shock absorption autoinflation air cushion is installed at the bottom of the rotary wing type unmanned aerial vehicle; the catapult is fixed to the top of the rotary wing type unmanned aerial vehicle; and the self-throwing type parachute is installed inside the catapult.