The invention relates to a dual-system ice layer thickness measuring device and belongs to the technical field of automatic detection. The measuring device has high precision and high durability, is mainly applied to the technical fields of water conservancy, hydrology and the like and is used for the automatic detection on the icing ice layer thickness of river ice, lake ice and sea ice. The dual-system ice layer thickness measuring device is characterized in that the measuring device belongs to the dual-system ice layer thickness measuring device for high-precision forecasting of water conservancy and hydrology ice conditions, and the whole set of measuring device consists of two parts including a transmission system and a measuring system. The dual systems are characterized in that the transmission system consists of two sets of identical lead screw transmission systems which are respectively a front transmission system and a back transmission system, the measuring precision of the measuring device is higher and can reach +/-2mm, and the measuring device belongs to an automatic monitoring device. The measuring device has the advantages that the measuring method is intuitional and is similar to the most common clamping measuring method (such as a caliper rule and a micrometer) in the mechanical industry, and the high-precision measurement of the ice layer thickness is realized. The dual-system ice layer thickness measuring device is suitable for the automatic measurement of the ice layer thickness of nearshore sea ice and riverway river ice or lake ice around a hydrological station.