The present disclosure discloses a monitor and a backlight module thereof. The backlight module includes a circuit board, a strip light, a buckle, and a quantum tube. The strip light is fixed to the circuit board. The buckle is fixed to the circuit board. The quantum tube is engaged into the buckle, and the quantum tube is parallel to the strip light, which are provided with an interval. The quantum tube is located between the light guide plate and the strip light, the light is emitted from the strip light to the light guide plate through the quantum tube. Through the above way, the present disclosure can ensure high luminous efficiency of the quantum tube in the backlight module, so that the color gamut of the backlight module is maintained at a high state.