This technical training video introduces the IEC-61131-3 standard and its associated PLC programming languages, including Ladder Diagram (LD), Instruction List (IL), Function Block Diagram (FBD), Structured Text (ST), Sequential Function Chart (SFC), and Continuous Function Chart (CFC). The content covers application scenarios, language comparisons, and practical examples such as traffic light control, helping engineers understand the real-world applications of each language in automation systems. It is designed for professionals in industrial control and automation to quickly grasp the core concepts of the IEC-61131-3 standard.