The invention relates to a pilot physiological parameter detector, which is designed to insert components needed for detecting the physiological parameters, such as a sensor, electrodes and a circuit, into a flight helmet under the circumstance that performance and functionality of the helmet are not influenced to realize the detection of pilot physiological parameters. The detector detects physiological parameters by using the helmet that a pilot must wear without a need of wearing any other device on the body of the pilot, which is of a convenient and rapid usage. The flight helmet physiological parameter detector provided by the invention can detect parameters of photoelectric pulse wave which reflect blood flow in the head, and can perform a judgment and an early warning on overload disability, which is particularly suitable to be used by pilots.