The invention relates to the field of edge sealing of packaging equipment, in particular to an edge sealing device used for edge sealing or opening sealing of packaging equipment. The edge sealing device comprises supporting columns, a supporting plate, a supporting block, an electric heating plate, a vertical block, an operation rod, a temperature sensor, a cooling fan and rolling wheels. The edge sealing device solves the problems that some existing edge sealing devices cannot detect the temperature on electric heating plates and heat radiation is slow.