The radiation tubes in the No.8 cracking furnace in the megaton ethylene plant of PetroChina Dushanzi Petrochemical Company were replaced by furnace tubes with enhanced heat transfer elements (raindrop shaped inner wall distribution) during the overhaul in 2019. Up to now, six operation cycles have been completed. The first cycle is 68 days from October 3, 2019 to December 10, 2019, and the second cycle is 94 days from December 16, 2019 to March 19, 2020. The operation after the modification with new radiation tube shows that the application of this new technology is one of the effective ways to increase production and reduce consumption.