Laser diode module

The invention discloses a laser diode module. In the laser diode module, a laser diode is bonded on a flexible circuit board, and the flexible circuit board and a plastic casing 2 are bonded together through a glue. A collimating mirror is adhered to a plastic casing 1, and through adjusting the relative positions of the plastic casing 1 and the plastic casing 2, the distance between the laser diode and the collimating mirror can be adjusted until laser reaches a collimation requirement. The plastic casing 1 and the plastic casing 2 are bonded together by use of the glue so that their relative positions are fixed. When the module runs, power is directly supplied through the flexible circuit board, the laser diode emits light, and the light becomes light beams through the collimating mirror. The whole module is made of a plastic material and is formed in a one-step mode, the material cost is low, and the processing steps are few. A whole system is directly connected with a mainboard through the flexible circui