A cooling fan assembly that prevents damage by a fire on a motor is provided. The cooling fan assembly includes a fan shroud that is formed to improve the circulation efficiency and is coupled to a vehicle body, a motor that is coupled to the fan shroud and applied with power to generate torque, a power supplying unit that is configured to apply the power to the motor and a blade that is disposed in the torque of the motor is configured to rotate to circulate open air. A blade hub coupled to a rotation shaft of the motor is configured to integrally rotate with the rotation shaft of the motor as a center portion of the blade. When the blade receiving the torque of the motor is static, the blade hub is compromised and the blade is configured to be released from the torque of the motor.