Two beams of light with different polarizations are incident on a focusing system with two lenses. Based on Richard-Wolf vectorial diffraction theory, the diffraction field distribution is calculated. Properties of optical trapping using the focusing system are analyzed when numerical aperture (NA) of lenses is low. A gold particle′s refractive index is higher than that of the medium (nm), and an air bubble′s is lower. When NA=0.58 nm, subwavelength bright and dark spot array is generated on the optical axis. These spots can be used to trap multiple gold particles and air bubbles. When NA=0.35 nm, wavelength cylindrical rings are formed around the optical axis, which can be used to two-dimensionally trap multiple air bubbles.