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A flexible hydrogel pressure distribution sensor has promising application prospects. However, the current hydrogel pressure distribution sensors are based on an array-type structure with complicated wires and extremely low resolution, which greatly reduce the flexibility of hydrogel and limit their applications. To overcome these limitations, we proposed and designed a hydrogel pressure distribution sensor that is able to obtain pressure distribution inside a whole piece of hydrogel. This is specifically done by arranging electrodes only around the hydrogel, which employs the strategy of electrical impedance tomography (EIT). Meanwhile, PAAm/PAA-Fe³⁺ double-network hydrogels were prepared as hydrogel pressure-sensitive substrates, and the feasibility of PAAm/PAA-Fe³⁺ hydrogels as sensitive elements for hydrogel pressure distribution sensors was confirmed through mechanical and electrical tests …