The invention discloses a novel bio-fertilizer device which comprises a device main body and a base, wherein the base is arranged at the bottom of the device main body; a mixing cavity is formed inside the device main body; a first hollow cavity which extends leftwards is formed inside the device main body on the upper side of the mixing cavity; an opened cavity is formed inside the device main body on the lower side of the mixing cavity; the tail end on the right side of the opened cavity penetrates through the right end surface of the device main body and is communicated with the outside; athird hollow cavity which extends leftwards is formed inside the device main body on the lower side of the opened cavity; the extended tail end on the left side of the third hollow cavity is arrangedopposite to the extended tail end on the left side of the second hollow cavity; a first sliding cavity is formed inside the device main body between the extended tail end on the left side of the thirdhollow cavity and the extended tail end on the left side of the second hollow cavity; the first sliding cavity is positioned in the left side of the mixing cavity.