This invention discloses a backlight module comprises a light guide plate, a middle frame, a quantum strip, and a light source disposed approximate to a light input surface of the light guide plate. The middle frame comprises a supporting portion and a containing portion connecting to the supporting portion, the supporting portion is disposed on a light output surface of the light guide plate, and the containing portion is disposed between the light source and the light input surface. The containing portion comprises a containing space, the quantum strip is disposed in the containing space, the a light transmitting hole is disposed on a first sidewall and a second sidewall of the containing portion for transmitting light from the light source via the quantum strip to radiate the light input surface of the light guide plate. This invention also discloses a liquid crystal display device comprises the above mentioned backlight module. The display device and backlight module in this invention is easy for assembly and reduces the risk of broking the quantum strip. The production yield is improved.