The invention discloses a working parameter detection method for a hammer body of a tamping machine of a coke furnace, which is capable of measuring acceleration of a tamping hammer in real time to calculate the throwing height and tamping power of the tamping hammer in a tamping period and simultaneously sending wireless radio frequency communication signals and ultrasonic wave signals through a signal sending device which is fixedly arranged on the tamping hammer, and then calculating the height of a cinder wall according to transmission time difference. The detection method is simple in steps and direct and accurate in measurement. The invention further discloses a detection device for performing the detection method, which comprises a receiving device and a detection and sending device which is arranged on the tamping hammer. The receiving device comprises a receiving end power supply, an ultrasonic wave receiving module, a wireless receiving module and a receiving end microcontroller. The detection and sending device comprises a sending end power supply, an ultrasonic wave sending module, a wireless sending module, an acceleration sensor and a sending end microcontroller. The detection device is simple in structure, direct and accurate in measurement results and free of being affected by dust and vibration on sites.