A power module and an electrical device are provided, belonging to the field of electrical device technologies. The power module includes: a base provided with a plurality of mounting parts and a first sliding structure configured to be slidably engaged with a cabinet, each of the plurality of mounting parts being provided with a second sliding structure; and a plurality of module bodies, each of the plurality of module bodies being provided with a third sliding structure slidably engaged with the second sliding structure, the plurality of module bodies being adapted to be mounted at the plurality of mounting parts via the third sliding structures, respectively.