The invention provides a method for detecting the drying uniformity of a supercapacitor core. The method comprises: (1), carrying out core preprocessing; to be specific, inserting thermosensitive testpaper into different positions of an electrode for a supercapacitor successively, making a core by combining a diaphragm, installing the core into a metal case, and carrying out sealing by using a porous metal foil to obtain a preprocessed battery core; step two, carrying out core drying; to be specific, transferring the core preprocessed in the (1) to a drying device and carrying out vacuum drying to obtain a dried core; (3), dismounting the core; to be specific, transferring the core dried in the (2) to a dry environment, dismounting the core, taking out the thermosensitive test paper at different positions in the core successively, and recording temperature values displayed on the thermosensitive test paper, and determining whether the core is dried uniformly based on the temperature differences at different positions in the (3). The detecting method has advantages of simple operation, high accuracy and low detection cost.