Black humor is a literary technique that usually uses humor, irony, sarcasm, and other techniques to express the dark side and defects of society and human nature. It has the following characteristics: 1. Irony: Black humor often reveals its absurdity and humor through irony of reality. It created some seemingly contradictory scenes or dialogue to achieve a kind of criticism and irony of reality. Black: Black humor usually uses black or dark tones of language and images to express a depressed, pessimistic, or desperate emotion. 3. Satire: The irony of black humor is usually to reveal its flaws and contradictions through irony of human nature and society. By revealing the injustice, corruption, hypocrisy and other aspects of society, it triggered the readers 'thinking and reflection. 4. Self-deprecating: Black humor is often used to express one's humor and wit in a self-deprecating manner to achieve a humorous effect. 5. Short: Black humor is often a short-lived literary style. Its expression is usually exaggerated and jumping, leaving a deep impression on people, but it is quickly replaced by other content. Black humor was a humorous and satirical literary technique that was often used to express the dark side of society and the shortcomings of human nature, thus causing readers to think and reflect.