The utility model provides a pair of pliers for disassembling and assembling a dust cap of a movable optical fiber connector. The pliers for disassembling and assembling the dust cap of the movable optical fiber connector comprises a flat nose pliers body, wherein the upper ends of two pliers arms of the flat nose pliers body are bent inwards, so that a pair of inward-bent pliers heads is formed, an arc-shaped groove is formed in the front end of each inward-bent pliers head, so that a pair of jaws used for clamping the dust cap is formed, and the maximum thickness of the end of the portion, where the corresponding groove is located, of each pliers head is smaller than the width of an annular groove formed in the outer circumferential surface of the dust cap. By the adoption of the special tool for disassembling and assembling the dust cap of the movable optical fiber connector, the efficiency of disassembly and assembly of the dust cap of the movable optical fiber connector can be improved greatly, the dust cap is prevented from being damaged, and the operating safety during assembly and disassembly is guaranteed; the special tool for disassembling and assembling the dust cap of the movable optical fiber connector has the advantages of being simple in structure, capable of being suitable for dust caps with different dimensions and low in manufacturing cost and use cost.