The invention provides a permanent detection passage assembly and a ship, and relates to the technical field of permanent detection passage assemblies. The provided permanent detection passage assembly comprises an outer plate and a bulkhead, the inner side face of the outer plate is provided with an outer plate longitudinal, and the outer plate longitudinal is connected and fixed with the bulkhead; a through hole is formed in the bulkhead along the extending direction of the outer plate longitudinal, the through hole is used for allowing detection workers to go through; the through hole strides the outer plate longitudinal, and the outer plate longitudinal penetrates through the through hole along the direction from the outer wall of the through hole to the inner wall of the through hole.The provided permanent detection passage assembly is applied to ships, and the technical problem in the prior art is solved that a walking platform needs to be set wider and thicker.