The difference between them is that intensive reading is relatively demanding and difficult. In school, intensive reading requires you to understand every word in the article and then memorize it. In every sentence, the teacher will analyze the structure.

Extensive reading only needs to understand the main idea of the article.

Its function is to enhance our reading ability and increase our knowledge by reading articles extensively! Extensive reading, as its name implies, is to read quickly, not to pursue the profound connotation of the article, but to understand the main idea of the article in the shortest time. Usually, the examination form is reading comprehension, including finding words to fill in the blanks from the text, understanding the meaning of the text, speculating the author's point of view, etc ... Generally speaking, it is easier than intensive reading, but more practical than intensive reading.