A method based on chaos immune algorithm was proposed to solve slant-bent-axle few-tooth-deference planetary gear transmission optimization. By taking mechanism volume and meshing angle as twin optimizing objective

it embodimented overall situation optimization and made the prameter more rational and suit. Making use of mechanism of immune memmory and immune regulation and immune cells surpass mutation

and combineing with memmmory store chaos search

it has high convergence speed and large probalility of getting the best solution. The simulation showed it reduced configuration dimension and advanced mechanism performance.