The utility model provides a cable pit which can well handle water accumulated in the pit and guarantee safe operation and service life of cables. The cable pit comprises a pit body (1) and is characterized in that the pit bottom of the pit body (1) is communicated with a water collecting well (5) which is deeper than the pit body (1) through a water guide channel (6), and the water collecting well (5) is 70cm deeper than the pit body (1). The water collecting well (5) is staggered with the positions where cable tubes penetrate, a circular cover plate covers the top of a well cover of the water collecting well (5), the bottom pit of the pit body (1) is provided with a water collecting pit (2), and the bottom of the water collecting pit (2) is communicated with the water guide channel (6). A water guide pipe for guiding the water accumulated in the pit body (1) to the water collecting well (5) is installed in the water guide channel (6).