The invention relates to a method to prepare and preserve homogeneous bioactive bone tissue, its steps: 1, obtaining: on the aseptic condition, obtaining homogeneous bone tissue; 2, finishing: eliminating soft tissue and periosteum, eliminating bone marrow tissue, and reserving partial joint bursa, ligament and adhesive point of muscle; 3, defatting: dipping in chloroformic methanol, washing with physiological saline and then packaging; 4, gradient temperature reducing: placing the preprocessed bone tissue in program temperature reducer to make gradient temperature reduction up to -40 deg.C--60 deg.C for 20-80 min.; 5, preserving: putting the bone tissue in the -60 deg.C - 80 deg. C refrigerator. It can keep the integrality of bone ultramicro structure, bone inducing activity, bioforce intensity and maintain a certain quantity of survival soft bone cells.