The basalt waste powder is a by-product of the crushing and processing of basalt stone. It has a fine grain size and is difficult to sell, and there is currently no widely adopted method for comprehensive utilization on a large scale. In this study, eight groups of basalt waste powder from different areas of Hainan Island were selected for analysis. The chemical and mineral composition of the basalt waste powder was determined by inductively coupled plasma emission spectrometer (ICP-OES) and X-ray diffractometer (XRD). The crystallization properties of the basalt waste powder were analyzed by differential scanning calorimeter (DSC), energy dispersive spectroscopy (EDS), and melting experiments. The surface morphology and crystal phase of the fibers prepared from the basalt waste powder were examined by scanning electron microscope (SEM) and XRD, and their properties were compared to those of standard fibers. The results revealed that the fiber prepared at a temperature of 1 450℃ tended to break frequently, and there was a significant presence of dendritic and acicular crystals on the fiber surface. These crystals were identified as wollastonite, quartz, melilite, and magnetite. After raising the temperature to 1 480℃ and maintaining it for 1 hour, continuous fiber was successfully obtained. However, the breaking strength of the fiber was slightly lower than that of standard fibers. Melilite and magnetite were also detected in the fiber. These results validate the feasibility of preparing continuous fiber from basalt waste powder from Hainan Island. This study offers practical guidance and a theoretical foundation for the treatment of basalt waste powder on Hainan Island.