The invention discloses an evaporation cavity. The evaporation cavity comprises a bottom plate, a top plate and a plurality of side plates, wherein the side plates are arranged between the bottom plate and the top plate; the bottom plate, the top plate and the side plates are mutually connected in a sealing way to form the hollow evaporation cavity; the side plates are provided with substrate conveying ports and maintenance ports; at least one side plate is the bent side plate in a bending structure; the bent side plate comprises an upper side plate connected with the top plate in a sealing way; the bent side plate slantly extends into the evaporation cavity along the upper side plate to form a middle side plate, and extends downwards along the middle side plate to form a lower side plate; the lower side plate is connected with the bottom plate in a sealing way; the evaporation cavity comprises an upper cavity, a middle cavity and a lower cavity which correspond to the upper side plate, the middle side plate and the lower side plate respectively and have successively reduced volumes; the substrate conveying ports are positioned on the upper cavity; and the maintenance ports are arranged from the middle cavity to the lower cavity. The evaporation cavity has the advantages of high strength, low cost, light weight and portability. In addition, the invention also provides an evaporation device with the evaporation cavity.