The invention discloses a pipeline fixing device capable of being conveniently installed. The device comprises a fixing block, a pull ring, a connecting rod, an inner cavity, a limiting spring, an arc-shaped plate I, a fixing hole, a mounting groove and supporting legs, wherein the fixing block is installed on the annular side surface of a pipeline, the pull ring is installed on the upper end surface of the connecting rod, the connecting rod is installed on the upper side inside the fixing block, and the lower end surface of the connecting rod is connected with the arc-shaped plate I; the arc-shaped plate I is installed inside the fixing hole, the fixing hole is formed inside the fixing block, the arc-shaped plate I is installed on the upper side of the interior of the fixing hole, the mounting groove is formed in the lower side inside the fixing block, the supporting legs are installed inside the mounting groove. The problem that the pipeline is not fixed enough after being installedis solved, and the device has the advantages of being reasonable in structure, good in stability, convenient to assemble and install, and high in reliability.