The invention relates to a multi-beam laser condensation transmission device. A conical tip of a reflection pyramid is arranged at the central position of a supporting column, the other end of the supporting column is arranged at the central position of a light incidence end face of a laser transmission condensation bar, and the central line of the reflection pyramid coincides with the central line of the laser transmission condensation bar. With regard to laser beams entering the lateral surface of the reflection pyramid, a plurality of laser beams entering the input end face of the laser transmission condensation bar perpendicularly are reflected by the reflection pyramid, enter a condensation section through a laser transmission section, is transmitted along the central line of the condensation section straightly, and enters a light shaping section through the condensation section; other light enters a hyperboloid of the lateral surface of the condensation section to form total reflection, is transmitted to the output end of the condensation section in a broken line mode formed by multiple total reflection, is gathered to the output end of the condensation section with small divergence angles, and then enters the light shaping section; therefore, light energy concentration of the multiple laser beams during transmission is achieved. The multi-beam laser condensation transmission device has the advantage of being simple in structure, small in size, low in cost, high in condensation efficiency and the like.