To solve the heat loss of the surface plasmon optical tweezers, an optical tweezers of siliconbased doublenanocylinder with nanoring is designed. The field enhancement effects of three different siliconbased nanostructures (siliconbased nanosphere, nanocylinder and nanoring) were calculated by finite element simulation at 1 064 nm incident light field. Then, according to the optical resonance mechanism of siliconbased nanostructures, a siliconbased doublenanocylinder optical tweezers with an electric field enhancement factor of 7.39 times is designed. On this basis, optical resonance coupling is generated between the center of the ring and the gap between the double nanocolumn of the optical tweezers by introducing nanoring to the optical tweezers, which makes the electric field enhancement factor reaches up to 11.9 times and forms a stable optical potential well. Finally, Maxwell's stress tensor method was used to capture and analyze polystyrene beads of different diameters in siliconbased optical tweezers. And the trapping force, trapping potential and capture stiffness of polystyrene spheres with a diameter of 25 nm at different positions were calculated and analyzed in the x, y and z directions. The designed optical tweezers of siliconbased nanocylindrical and nanorings can achieve good results for the capture of polystyrene spheres.