The present invention provides a backlight module, which includes: a backplane (2), a light guide plate (4) arranged in the backplane (2), a backlight source (6) arranged in the backplane (2) and located at one side of the light guide plate (4), a light shield (8) arranged between the backlight source (6) and the backplane (2), and a side reflection plate (10) arranged between the light guide plate (4) and the backlight source (6). The backlight source (6) includes an LED substrate (62) and a plurality of LED lights (64) mounted on the LED substrate (62). The side reflection plate (10) has resiliency. The side reflection plate (10) includes a plurality of openings (102) formed therein to correspond to the LED lights (64). The LED lights (64) are receivable in the openings (102) to serve as light sources of the light guide plate (4).