The present invention discloses a connecting modular structure for DC output of power supply. The power supply installed in electronic equipment has a housing and the housing has a mainboard installed that is connected to the external input power, and the mainboard has more than one DC output conducting contact points, and the other end of the conducting contact point is respectively connected with the DC power output connector via electric wires, and the power connector is fixed onto the lateral board of the housing so that when in use, the electric wires would not be exposed since the power connector is fastened onto the lateral board of the housing, whereby other devices of the electronic equipment can be connected to the power connector on the lateral board and get the needed power. Thus, the lateral board looks tidy and neat and is convenient for use.