The invention discloses a side-incoming type backlight module and a liquid crystal display device with the same. The side-incoming type backlight module comprises a light guide plate and a light source component located on the side of the light guide plate and is characterized in that the light source component comprises a PCB and a plurality of LED chips connected to the PCB, the side of each LEDchip is provided with a limit part, and the top end of each limit part protrudes out of the light outgoing face of the corresponding LED chip and is connected to the light incoming face of the lightguide plate in an abutted manner to limit the coupling light distance between the light outgoing face of each LED chip and the light incoming face of the light guide plate. The side-incoming type backlight module has the advantages that the high-density light source can be achieved, and the coupling light distance between the light outgoing faces of the light source and the light incoming face ofthe light guide plate can be limited effectively.