By looking at Afghanistan novel writing and its ups and downs, some realities about intellectual and literary developments of this society become clear for the audience that require extensive research. One of these realities is Modernism and Postmodernism in the fictional literature of Afghanistan which links the Afghan novelists' society with the contemporary fiction writing society and illustrates the life aspects of an Afghan, especially the life of intellectuals in this country. This article is an attempt to reflect the important Modernist and postmodernist trends of novel writers in Afghanistan through a descriptive-analytical approach by exploring the contemporary novels in Afghanistan after the coup of 7th of Sur (April), 1357. The results suggest that we cannot speak of institutionalization of modernist and postmodernist novel writing in the fictional literature of Afghanistan, but there is an increasing growth of elements and components such as identity crisis of fictional characters, consequences of war and migration of  Afghan men and women, attempts to deconstruct the opposition of man / woman in Afghanistan’s male-dominated writing system, representation of intensive confrontation between traditionalism and modernism, etc. This indicates the emergence of new literary styles in fictional literature in Afghanistan, Quasi-modernist and sometimes Quasi-postmodern styles, which often have been adapted by emigrant intellectuals, following and imitating the western techniques of fiction writing.