The collection of this systematic article was an attempt to show a survey of current activities in the field of error analysis in English language from 2012 to 2018 in Iran. In the country, English is being taught as Foreign Language from middle school. Khansir and Gholami Dashti (2014) mentioned that English accepted as language to pass in the examination. However, English system in this country often put on formal accuracy and teachers focus on the teaching of English grammar in their classes. Error analysis approach has been a widely discussed topic for more than 60 years over the world. However, all the findings of this paper from previous research works on error analysis can be good reasons in order to guide and help reduce such errors in the written language of Iranian students in EFL setting and the results of this work can also be used to as a guide for English learners over the world. This article identifies and presents the major reasons leading to the English written errors among the Iranian learners. Finally, it reports the effective strategies and suggestions for helping the students to improve their English language. The researchers of this study studied 178 papers in this process and 37 of the papers were relevant.