Abstract: With the development of drilling deep,ultra-deep,horizontal,and HPHT wells,more challenges in cementing have occurred,conventional liner cementing tools and technique have difficulty meeting the new requirements.To solve complex problems in cementing,a new type of multi-functional liner hanger was manufactured,which included rotary mechanism,setting device,hydraulic release and top packer etc,and the finite element method was used to simulate some key components to optimize structure and parameters.Calculation and tests show that all parts can meet the needs of designing performance,function and parameters.The paper showed that multi-functional liner hanger used in the Well WZ6-12-A3S,has powerful adaptability in complex down-hole conditions.