The invention discloses a coupling-bionics-based food crispness tester which comprises a chewing simulator, a cracking signal acquisition system and a data processing and analysis system, wherein the chewing simulator is used for simulating the food chewing of a human chewing system; the cracking signal acquisition system is used for acquiring a pressure signal and a sound signal, which are generated during the chewing of the chewing simulator; the data processing and analysis system is used for receiving the signals, and performing data processing and analysis to acquire a predetermined food crispiness result. The coupling-bionics-based food crispness tester is established by simulating the human chewing system and an auditory system by a bionic technology, and is used for acquiring mechanical and acoustic signals when the food is chewed, establishing a sensory crispness evaluation and mechanical and acoustic signal prediction model and comprehensively determining the crispness of the food by utilizing the model; an integrated manual technical system with the characteristic of achieving maximum environmental adaptability with low energy consumption is constructed; a test is carried out from a crispness formation mechanism, and is superior to crispness evaluation from other indexes such as cracks and simply from the mechanical signals.