A volute fan assembly structure comprises an installation plate (4) and at least two adjacent volute fans installed on the installation plate (4). One of the two adjacent volute fans has a middle inclined air outlet located between the two adjacent volute fans. The middle inclined air outlet extends obliquely from back to front towards a direction away from a volute casing of the volute fan having the middle inclined air outlet. The volute fan assembly structure can stagger an air outlet of a second volute fan (2) from a first volute fan (1) and a third volute fan (3) to reduce interference. Also provided is a floor-standing air conditioner having the volute fan assembly structure.