In recent years, energy shortage and climate change have been increasingly serious, so that cellulose-based hydrogel solid electrolytes hold great promise for safe, sustainable and efficient energy storage materials. However, it is challengeable to simultaneously achieve high conductivity, excellent mechanical properties and wide temperature range of hydrogel solid electrolytes. Here, carboxymethylcellulose (CMC) was introduced for constructing ion migration channels and polymer skeleton of dual-network organohydrogels. Meanwhile, 2-urea-4[1H]-pyrimidine methyl methacrylate (UPyMA) network, which interpenetrated with CMC, imparted CMC-based organohydrogels with enhanced conductivity and mechanical properties. The ionic conductivity achieved as remarkable as 95.72 mS cm