An expanded bamboo salt producing method comprises the following seven steps: 1, preparing materials, including bamboo material selection, bamboo barrel production, and preparation of salt to be processed and pine wood as fuel; 2, filling the salt into bamboo barrels; 3, selecting a roasting furnace; 4, charging, including substeps of examining and cleaning the furnace before charging, installing a grate and charging the bamboo barrels; 5, igniting, roasting, and dewatering the salt; 6, expanding the dewatered salt; and 7, postprocessing the expanded bamboo salt. Only through two hot processing stages of dewatering and expanding, the expanded bamboo salt produced by the expanded bamboo salt producing method is heated to the maximum temperature 835 DEG C; after repeatedly expansion for 3-5 times, the vast majority of heavy metal ions can be removed, a majority of beneficial components in the bamboo and pine resin can be fused, and organic impurities in edible salt can be burned out; the expanded bamboo salt producing method is low in energy consumption, short in production cycle, little in salt loss, high in yield of the bamboo salt and low in production cost; and sold bamboo salt products are low in price, can be easily accepted by consumers and have a wide consumer group.