Cable duct

The invention relates to a cable duct, which comprises a steel base layer, wherein each of the inner wall and the outer wall of the steel base layer is provided with a hot galvanizing layer; the innerwall of the hot galvanizing layer on the inner wall of the steel base layer is coated with an anti-oxidization layer; and the outer wall of the hot galvanizing layer on the outer wall of the steel base layer is coated with an anti-oxidization layer. The cable duct has the characteristics of high corrosion resistance, long service life and no harm to a cable. 本发明涉及种线缆导管，其包括钢基层，钢基层的内壁和外壁均设有层热镀锌层，钢基层内壁的热镀锌层的内壁涂覆有层防氧化层，钢基层外壁的热镀锌层的外壁涂覆有层防氧化层。本发明具有耐腐蚀性好，使用寿命长，对线缆无损害的特点。