The invention relates to a direct fluorescence labeling method for displaying a cryptocaryon irritans brown microtubule cytoskeleton structure, which comprises the following steps of: preparing a glass slide coated with polylysine; permeating cryptocaryon irritans brown cells through solution PHEM (Postherpetic Erythema Multiforme) containing saponin, and adding PHEM solution for immersion bath; fixing permeated cells through paraformaldehyde solution, and carrying out immersion bath through the PHEM solution, and transferring the fixed cells to the glass slide coated with the polylysine; dripping Triton X-100 water solution on the cells after removing extra fluid, carrying out immersion bath through the PHEM solution, and rinsing through 0.01mol / L of phosphate buffer; rinsing through 0.10mol / L of PBS (Phosphate Buffer Solution) after keeping from light, hatching through the PBS containing 1mu mol / L of fluorescence taxoid at room temperature, removing extra solution, and capping the glass slide; and finally, observing through a microscope and taking photos. The method is simple to operate, has high efficiency, is environmental-friendly and has no pollution.