The invention discloses a module connector and an assembling method thereof. The module connector comprises an insulation body provided with a plurality of installing grooves, a conductive terminal arranged in the insulation body and a plurality of LEDs arranged in the installing grooves of the insulation body, wherein the conductive terminal comprises a first conducting pin, the LEDs are provided with light-emitting parts and pins extending from the light-emitting parts and inserted into the installing grooves, when the pins of the LEDs are inserted into the installing grooves, the first connecting pin is extruded and matched with the pins of the LEDs. The LEDs are in a passive interference state during the process so as not to be damaged. Meanwhile, the module connector is easy to install and operate. The LEDs are closely and reliably matched with the conductive terminal.