The invention belongs to equipment used in an electrified railway contact system, in particular to a bending moment-free anti-pollution high-speed segmenting and phase-splitting isolator, which is characterized by comprising a joint wire clamping plate (1), a joint wire clamp connecting plate (2), a connecting plate (3), a short sliding plate (4), a long sliding plate (10), a starting rod A (5), astarting rod B (5), a frame (6), an insulating sliding plate (7), silicon rubber isolators (8) and a fastening standard component (9), wherein the joint wire clamping plate (1) clamps a contact wire;and stressed axes of two silicon rubber isolators (8), the axes of connecting bolts at two ends of the connecting plate (3) and the groove of a contact lead are in the same axis. A pantograph of thebending moment-free anti-pollution high-speed segmenting and phase-splitting isolator can smoothly pass through at a high speed without generating bending moment, pantograph scratch and pantograph drilling. The bending moment-free anti-pollution high-speed segmenting and phase-splitting isolator cannot worn by the pantograph, has no pollution and cannot be burnt out by an electric arc.