Today's world is running according to the saying of the poet, "Thiraikadal odiyum diraviyam thedu". Literature helps to understand the commercial skills of Tamils. The entire Silappadhikaram, one of the five great epics, has the business industry in the foreground. This is because the Silappadhikaram reflects the lifestyle of the merchant clan. This article examines the story of the trade that was carried out across the sea in the Pukarankandam, which was divided into two large parts, Pattinapakkam and Maruvurpakkam, in the beginning of this epic, and the story of the trade that took place when Kovalan went to explore the beauty of the city of Madurai, where the Nalankaadi, which was in the form of a street, was replaced by an Allankaadi.