Optical signal transmission device

The invention discloses an optical signal transmission device. The optical signal transmission device comprises a lens base body, a cover plate, an optical fiber plug and a PCB. An insertion block isformed at the front end of the optical fiber plug, a plurality of optical fibers penetrate through the optical fiber plug, a socket is formed in the rear end of the lens base body, the inserting blockis inserted into the inserting opening and is tightly matched with the inserting opening, a notch is formed in the top of the lens base body, a reflecting inclined surface is formed on the inner wallof the notch, a laser device arranged on PCB, a laser beam emitted by the laser is reflected to the end surface of the optical fiber through the reflection slope, the optical signal is transmitted outwards through the optical fiber, the cover plate is arranged at the top of the lens base body in a stacked mode, buckle plates extending downwards are formed on the edges of the periphery of the cover plate respectively, the m