A power connector socket includes a housing and a lamella cage. The housing includes a socket and an opening at a side portion of the socket. The lamella cage passes through the socket and includes a ring portion and contact lamellae. The ring portion is adjacent to the opening. The contact lamellae outwardly extend from a side portion of the ring portion and are annularly arranged. One of two ends of each of the contact lamellae includes a fixed end formed on the ring portion, and a free end outwardly extends from the other end of each of the contact lamellae. The contact lamellae include contact portions extending toward an interior portion of the socket. The contact portions are a first position adjacent to the fixed end of each of the contact lamellae and on a second position of a middle portion of each of the contact lamellae.