PURPOSE: A bio-implantable device and a surface treatment method thereof are provided to enhance coupling power of bone and an implant by forming grooves on the surface of the implant. CONSTITUTION: A surface treatment method of a bio-implantable device comprises: a step forming grooves having the diameter of 10-50 micrometers on the surface of the bio-implantable device； and a step of forming a titanium dioxide nanoporous layer inside the groove. The formation of the groove is performed in a method of removing coated materials with an etching solution after spraying and coating biocompatible materials of a powdered state on the surface of the groove through a low temperature atomizing method. The nanoporous layer is formed through an anodizing method.본 발명은 예를 들면 인체의 골에 이식되는 임플란트의 표면에 분화구 형상의 큰 요홈을 형성한 다음, 양극 산화법 등을 이용하여 이 요홈 내부에 나노 기공층을 형성함으로써 임플란트 매식시에 나노 기공층의 탈락을 방지하는 할 수 있는 생체에 이식 가능한 몸체의 표면처리방법에 관한 것이다.
