External corner line structure and fabricated wall

The utility model provides an external corner line structure and an assembly type wall, and relates to the technical field of assembly type constructions.The external corner line structure comprises an external corner basic part and an installation part, the external corner basic part is used for being arranged at an external corner of the wall, the installation part is connected with the external corner basic part, and the installation part comprises a positioning part and an anti-loosening part which are connected; the anti-loosening part is used for abutting against the outer wall of the wall body to enable the positioning part to deform when the fastener penetrates through the positioning part and is locked into the wall body, then prestress is generated on the fastener to prevent the fastener from loosening, and the fabricated wall body comprises the external corner line structure. The anti-loosening part can effectively prevent the fastener from loosening so as to ensure the stability of the external co