An electrical power connector and a terminal assembly are disclosed. The electrical power connector includes a base and at least two terminal assemblies being symmetrically mounted in the base. Each terminal assembly includes a conductive terminal and a reinforcing terminal. The conductive terminal has a plate-shaped main body, a flexible engaging portion and a mounting end. The reinforcing terminal has an upright portion, an L-shaped pressing portion and an U-shaped latching portion. The upright portion is attached to one side of the plate-shaped main body of the conductive terminal, the latching portion is located at the other side of the plate-shaped main body, and the pressing portion presses the flexible engaging portion. The electrical power connector of the present invention employs the two terminal assemblies having high conductivity and good elastic to provide a better electrical performance and a long term reliable connection.