A power connector assembly includes a first electrical connector and a second electrical connector mating with the first electrical connector. The first electrical connector includes a plurality of first hollow tubes. Moreover, a plurality of first conducting terminals are disposed within the first hollow tubes, selectively. Each first conducting terminal has a flat contacting part. The second electrical connector includes a plurality of second hollow tubes corresponding to the first hollow tubes. Moreover, a plurality of second conducting terminals are disposed within the second hollow tubes, selectively. Each second conducting terminal has a terminal-clamping part. When the first electrical connector and the second electrical connector are combined together, the flat contacting part of each first conducting terminal is clamped by the terminal-clamping part of the corresponding second conducting terminal, so that electrical connection between the first electrical connector and the second electrical connector is established.