Collision energy absorbing structure of passenger car and use method thereof

The invention discloses a collision energy absorbing structure of a passenger car. The collision energy absorbing structure of the passenger car comprises an intermediate clamping box, a bumper and arebounding clamping corners, wherein the rebounding clamping corners are movably mounted at the outer surfaces of two sides of the bumper and are abutted and fixed to the bumper through rotating shafts; sliding guide wheels are movably mounted on the top parts of the rebounding clamping corners; second rotating wheels are movably mounted on the inner surfaces of the inner sides of the rebounding clamping corners, and first rotating wheels are movably mounted at the inner sides of the rebounding clamping corners and are close to the lower parts of the second rotating wheels; the second rotatingwheels are abutted and fixed to the first rotating wheels through spring propping rods; two groups of telescoping sliding rods are fixedly mounted on the outer surface of the rear end of the bumper;and the bumper is abutted a