Reading teachers focus more on the instruction of reading content or strategies, but pay relatively less attention to the impact of writing on reading comprehension. Based on mediation theory, the author examined the effect of summary writing about reading texts on readers' comprehension. By reviewing relevant literatures on the topic of reading and writing connections, the author explained how summarization as a way to guide English-as-a-Foreign-Language (EFL) learners to read and learn improves their reading abilities. One implication for teaching reading is that compared with exclusive reading instruction, an interactive model of reading and writing can better improve EFL readers' comprehension.