The invention discloses a precise energy-saving anti-explosion compensator and belongs to the technical field of heat distribution pipeline compensation devices. The compensator comprises an inner pipe and a reducing pipe composed of a reducing pipe A segment, a reducing pipe B segment and a reducing pipe C segment. When the reducing pipe, a sealing piece B gland, a cable gland and the inner pipe are extruded and pushed through radial thermal expansion force, the reducing pipe, the sealing piece B gland, the cable gland and the inner pipe can coaxially and synchronously rotate and move relative to one another as a whole in the radial direction through rotation of a threaded area, wherein the sealing piece B gland and the cable gland are integrally fixed to the reducing pipe. Due to the adoption of the structure, the compensator has the advantages that the coaxial precision is high, the pressure bearing capacity is higher, the medium application range is not limited, pipeline running is safer, and maintenance is convenient.