The utility model provides a can install instrument of pipeline backplate fast, includes: the upper portion anchor clamps that can reciprocate in the frame are installed to a frame, the lower part anchor clamps of pin joint bottom the frame, and wherein, two connectors are installed to the bottom of frame, and the both sides arm of frame constitutes first sliding pair, the lower part anchor clamps are equipped with: a rotatory floorbar, rotatory floorbar both ends are fixed in the bottom of frame, and a pair of first splint are installed relatively at the middle part of rotatory floorbar, install first arc clamp plate on the first splint, the upper portion anchor clamps are equipped with: a sliding beam, a pair of second splint are installed relatively at sliding beam's middle part, install second arc clamp plate on the second splint, and a slip baffle is respectively installed at sliding beam's both ends to form the second sliding pair, when jack during to the push -down, first sliding pair forms the friction with the second sliding pair and slides, and messenger's backplate is tightly laminated on the pipeline. The utility model discloses not only solve the loaded down with trivial details problem of construction steps, moreover, make pipeline and backplate carry out seamless, guaranteed construction quality.