The invention discloses a preparation method for carrying out extracellular matrix biomimetic treatment on the surfaces of any parts of a metal tooth implanting system which are in contact with hard and soft tissues in the body. The surface of an implant is charged and the implant is alternately dipped in extracellular matrix solutions with opposite electrical properties, stands for a period of time, and is taken out for washing; the procedure is repeated for a plurality of times and finally cross bonding is conducted to obtain an extracellular matrix self-assembly film. The method has simple preparation procedure and does not need complex instruments, the film-forming ability is not affected by the sizes and shapes of different parts of the implant, the safety is high, the obtained tooth implanting system can facilitate the healing and stabilization of the hard and soft tissues around the implant simultaneously, thus reducing complication of implant restoration and increasing long-term success rate.