The invention discloses a weed model based encrypted domain image reversible watermarking method and belongs to the field of information security. In view of the deficiencies of small embedding capacity, poor security and the like of a current encrypted domain image reversible watermarking method, a relationship between watermarking information and an encrypted image is simulated by using a relationship between weeds and crops; a weed model is established; the security of the method is enhanced by adopting a chaotic system; and a user selects the embedding capacity of an expansion algorithm according to the watermarking information by utilizing the size of a weed region. A watermark embedding process comprises the core steps of: selecting the high-security chaotic system; encrypting an original interactive image by adopting an image encryption algorithm to obtain the encrypted image; and mixing the encrypted image with the watermarking information by utilizing the weed model and the chaotic system to obtain a watermark image. A watermark detection process is nearly a watermark embedding reversible process. Experimental results show that the method is large in embedding capacity and high in algorithm security, and can effectively realize secure protection of image information network interaction.