This paper presents an intelligent cutting system based on a Fanuc M-20iA six-degree-of-freedom industrial robot integrated with a CO2 laser. The system achieves flexible transmission and stable control of the laser beam through a hollow arm structure and a built-in light-guiding arm. Combined with trajectory planning algorithms and process parameter optimization, it effectively enhances the precision and efficiency of gate cutting. This study provides a highly flexible and efficient automated solution for post-processing of plastic products, especially suitable for modern production needs with multiple varieties and small batches. The average processing time for a single piece of mechanical arm laser cutting is 7.8 seconds, significantly lower than the 22 seconds of traditional manual cutting, representing an efficiency improvement of approximately 64.5%.