A housing assembly of a valve and a valve. The housing assembly of a valve comprises: a valve base (10) and a housing (20) fixedly disposed on the valve base (10). The valve base (10) has a first fitting end face facing the housing (20), and the housing (20) has a second end face fitted with the first fitting end face of the valve base (10). The housing assembly further comprises: a sleeve (30) having at least one portion sleeved on the housing (20); and a reinforcement portion (40) disposed on an outer side wall of the sleeve (30). The reinforcement portion (40) comprises a first reinforcement portion (41) located above the first fitting end face. The housing assembly of a valve and valve can effectively address the problem in the prior art in which fatigue is likely to occur at a weld line of a housing assembly.
