Abstract: A housing adapted for a power filter and a power filter comprising the housing are provided. The power filter further comprises a filter element, a protection ring, and a connection line. The housing comprises a bottom wall, a sidewall, and an opening. The sidewall is disposed adjacent to the bottom wall to define a receiving space for receiving the filter element. The sidewall comprises an upper edge, with the opening extending downwards from the upper edge. The protection ring for protecting the connection line can be inserted into and fixed in the opening from the upper edge. With this opening, the power filter of the present invention can be assembled with greater ease.