The anti-theft hard ltag has a stable alarm function, can be strongly attached to the goods, and has a longer service life. ? the hard ltag has high durability and can be reactivated to realize repeated use. It is mainly applicable to various scenarios such as supermarket, clothing store, tool store, etc. it can be used on liquid and metal packaging, effectively reducing the loss of theft preparation, increasing the profit of the store, and improving the shopping experience.