A power connector socket includes a main body and a lamella cage. The main body includes a socket, an opening at a side portion of the socket, and a chamber inside the socket. The lamella cage passes through the socket. The lamella cage includes a ring portion and contact lamellae. The contact lamellae outwardly extend from a side portion of the ring portion and are annularly arranged. The ring portion is in an inner side of the chamber. One of two ends of each of the contact lamellae includes a fixed end formed on the ring portion, a free end outwardly extends from the other end of each of the contact lamellae, and the free ends are positioned at a portion of the main body adjacent to the opening.