The utility model provides a compression packer capable of allowing an optical fiber to pass. The packer is mainly formed by an upper connector, a central pipe, an optical fiber passing channel, a hydraulic cylinder, a sealing ring, a piston, an upper support, a shear pin, stable nails, a metal frame, a rubber barrel, a lower support and a lower connector. A liquid inlet hole is formed in the central pipe. The optical fiber passing channel is directly formed by punching the thick wall of the central pipe. The upper support is connected with the central pipe through the shear pin. The upper support and the lower support are connected with the metal frame through the stable nails. The metal frame and the rubber barrel are vulcanized integrally. The compression packer can be used as a segmenting packer for reasonably segmenting an oil layer, the optical fiber can pass through the compression packer, the compression packer is matched with an optical fiber sensor, and the pressure, temperature and other parameters of the oil layer segment can be detected in real time.