Method for simultaneously producing collagens, chicken oil and high-calcium powder through using chicken bones

The invention discloses a method for simultaneously producing collagens, chicken oil and high-calcium powder through using chicken bones. The method comprises a step of raw material treatment, a step of chicken oil separation, a step of chicken oil preparation, a step of two-step enzymatic hydrolysis, a step of high-calcium powder separation, and a step of collagen preparation. The method which utilizes the above six steps has the advantages of realization of the clean comprehensive utilization of the chicken bones, clean, green and pollution-free production process, no wastewater discharge, improvement of the quality of the collagens, suitableness for the large-scale industrialized production, and substantial economic and social benefits.