Pipeline monitoring device

The invention provides a pipeline monitoring device. The pipeline monitoring device is applicable to a plurality of sections of continuous pipelines of which pipe walls are covered with heating sleeves, each of the heating sleeves corresponding to each of the sections of pipelines is connected with a temperature monitoring element, and a plurality of temperature monitoring elements are connected in series and are electrically connected with a controller. The pipeline monitoring device detects each of the sections of the heating sleeves through connection of each of the heating sleeves corresponding to each of the sections of pipelines and temperature monitoring elements, so that required temperatures can be kept in all sections of pipelines.