India's exports declined at an annual rate of 28% in July - the 10th consecutive month of falls.
Official figures showed a total $US13.6 billion worth of goods and services were exported during the month.
At the same time, India's imports were down 37% to $US19.6 billion in July.
Last week, the Indian government announced a series of measures to help exporters, including tax breaks and better access to finance.
The latest export figures come a day after the Central Statistical Organisation said the economy expanded at an annual rate of 6.1% between April - June, up from 5.8% from January to March, lifted by government stimulus spending.
A separate study on Tuesday showed that Indian manufacturing activity expanded at its slowest rate in five months in August.
The purchasing managers' index from HSBC totalled 53.2 points in August, down from 55.4 in July. Any figure above 50 indicates growth.