Abstract: Difficulties in fire protection design of shared space was analyzed and the cases of fire protection design of domestic shared space were researched. The contradiction between the fire safety and the use function was analyzed and the solutions for it were put
forward. Taking a large size shared space of an office building as an example, technical requirements for the design of smoke exhaust and curtain wall of shared space were put forward, numerical simulation was carried out to verify the design, and to achieve the fire safety. It could put the reference for fire protection design of similar building.

Key words: shared space, enclosure structure, natural smoke exhaust, fire safety