St Asaph-born businessman Dr David Williams said the shop gives a bad impression of Wales.
And he claims an opportunity to boost Welsh business in the United States is being overlooked.
Dr Williams, who is chairman of the Welsh North American Chamber of Commerce, said: "I visit the park regularly and have seen the standard of the shop deteriorate.
"When I last visited before Christmas there was tartan all over the place with very little to promote Wales. Frankly it is embarrassing and pathetic at present.
"Fifteen million high-income visitors pass through the Epcot centre every year and, although the shop is tucked away in the UK pavilion, it is there and is the perfect place to raise awareness of Wales.
"There is tremendous opportunity for Welsh business here but it is being lost."
Dr Williams is anxious to see the situation reversed.
He says the organisation is facilitating discussions with the Disney organisation to revitalise the operation.
"We are keen to see a stronger Welsh presence in the shop and meetings are planned to take place next month. We hope that Welsh companies, who produce high quality crafts and other goods, will be interested in supplying the shop." Last night Disney officials in the USA confirmed there were no Welsh products on sale at present in the Magic of Wales store.
Spokesman Jason Lasecki said it was due to the recent retirement of the shop's supplier.
He said: "We are exploring various options and hope to rectify the situation real soon."
