The armed conflict between the Myanmar junta and ethnic minority groups could reduce Thai-Myanmar border trade value by 40%, says the Federation of Thai Industries (FTI).
Myanmar imports consumer products and energy mainly through Myawaddy, opposite Tak's Mae Sot district.
The Asian Highway passing through the town links Tak and Yangon.
"Total border trade between Thailand and Myanmar is worth more than 100 billion baht a year," said Suriyon Tuchinda, chairman of the border trade subcommittee under the FTI.
"Trade will suffer if the conflict is prolonged."
He said he hopes the junta and Karen ethnic group can find a solution to their latest confrontation for the sake of the economy.
The Commerce Ministry reported Myanmar's top 10 imports from Thailand between January and February tallied 27.5 billion baht, a 0.19% decrease year-on-year.
The imports included diesel, which increased by 1.49%, while fuel oil decreased by 0.93%.
Beverage imports rose by 5.48%, rubber imports gained 18.3% and sugar jumped by 17.8%. Other agricultural product imports grew by 4.94%.
Computers and computer parts declined by 18.1%, while other industrial products fell by 17.6%.
Internal combustion engine vehicle imports declined by 18.6%, though equipment and parts increased by 6.61%.
Myawaddy-Tak is one of five border checkpoints between the two nations. The others are Mae Sai in Chiang Rai, Phu Nam Ron in Kanchanaburi, Sing Khon in Prachuap Khiri Khan and Ranong.
According to the FTI, trade with Myanmar makes up 24% of total border trade, following Malaysia (31%) and Laos (28%). Border trade value with Cambodia represents 17%.