An optical needle is a specialized spatial light field characterized by an extremely small transverse spot size, capable of breaking through the diffraction limit, and also prossessing a long focal depth in the longitudinal direction. Typically, optical needles are generated by tightly focusing a beam using a lens. In this work, the generation of optical needles is demonstrated by using circular Airy vortex beams (CAVBs) through adjusting the conical angle. The CAVBs have a uniform distribution of circular polarization, thus eliminating the need for radial polarization states. Our research indicates that under the conical angle modulation, CAVBs with a topological charge of –1 (left-handed circular polarization) and 1 (right-handed circular polarization) can form optical needles. These optical needles possess a minimal transverse spot size, enabling them to exceed the diffraction limit while maintaining a long depth of focus. Furthermore, the depth of focus of the optical needle is almost linearly related to the primary ring radius of the beam. Increasing the primary ring radius can effectively enhance the depth of focus. CAVBs with different topological charges generate distinct hollow light fields, unlike optical needles. This is because the longitudinal component of the light beam is significantly enhanced by adjusting the conical angle. Only CAVBs with the appropriate topological charge exhibit a longitudinal light field near the optical axis, leading to the formation of optical needles. In contrast, other charges result in a hollow longitudinal light field, creating different hollow light fields. These research findings could have significant applications in super-resolution imaging and optical micromanipulation.