Abstract: The process characteristics and key technology of uneven asynchronous loading extrusion forming were analyzed, the process simulation and experimental research were conducted for the forging process of a complex crankshaft component. The two extrusion process models of synchronous proportional loading and non-uniform asynchronous loading were established, and the metal flow pattern and extrusion defects were analyzed with the finite element method. The results show that the metal at the root of the mold cavity in the synchronous loading process has folded, the metal flow is smooth during asynchronous loading process, the forging is full filling without fold and crack defects. The process trial production was conducted for a crank throw component, the forging is full filling without fold and crack defects. After heat treatment, the tensile strength reaches 1120 MPa, the elongation reaches 16%, its performance fully meets the requirements. Therefore,uneven asynchronous loading extrusion forming can not only achieve a complete three-dimensional compressive stress state for the blank, but also control the flow speed and filling method of the blank in the mold cavity in real-time during forming,and fulfill the complete forming of complex component and overcome the formation of defects, which is a new technology worth promoting.