Method for detecting underground cable channel

The invention discloses a detection method, and in particular relates to a method for detecting an underground cable channel. The method comprises the following steps of: (a), placing a detection device in a tested cable channel through a vertical shaft; (b), fixing ropes at two ends of the detection device, wherein one end of the ropes corresponding to the fixed ends is arranged in a corresponding vertical shaft; and (c), pulling the ropes to ensure that the detection device in the cable channel moves to perform blockage detection on the cable channel. By the method, the problem of non-standard detection of the underground cable channel in the prior art is solved; and the method for detecting the underground cable channel is simple and feasible, and is reliable in detection. The method is reliable in detection of the underground cable channel, is low in cost, and is easy to popularize widely.