Backlight module provided with spliced reflecting face

The invention discloses a backlight module provided with a spliced reflecting face. The backlight module includes a reflection bottom face, a light emitting top face and a light source module. The reflection bottom face is provided with a light receiving side and the light source module is arranged long the light receiving side. The light emitting top face is opposite to the reflection bottom face and an interlayer space is arranged between them. Light beams produced by the light source module enters into the interlayer space through the light receiving side and are then reflected by the reflection bottom face, pass through the interface space and arrives at the light emitting top face. The reflection bottom face includes at least one first reflection face and at least one second reflection face. The first reflection face and the second reflection face are arranged at intervals along the extending direction of the light receiving side. The mirror reflection rate of the first reflection face is greater than that of the second reflection face.