Mustafa Zaidi (1930-1970) a well-known poet and a talented CSP officer whose work especially in (Urdu Nazm and Ghazal) had been appreciated by such literary stalwarts as Josh Maleehabadi and Firaq Gorakhpuri. The initial phase of Zaidi’s poetry was a romantic one, in every sense of the word, but gradually he began to deplore the ruthless realities of a more wearisome nature and turned sour. The interesting fact is that, though Zaidi was not a conventional religious person, his poetry reveals his deep association with religious affairs. He used Karbala as a Metaphor in many of his poetic expressions. In the last phase of his life, he was writing a marsiya named Karbala Aye Karbala but due to his untimely death, it remained incomplete.  He  wrote 150 couplets of this marsiya which indeed are a significant addition  in the Urdu Marsiyas. In this research paper,  a detailed critical analysis of Karbala Aye Karbala has been made with keeping in view to reveal its literary significance among the others of the same genre.