The retail group will begin to change television ranges to digital-only flat screen LCD and plasma screens immediately with no further orders placed for analogue TVs once existing commitments are fulfilled.
DVD recorders featuring analogue tuners will also be removed from its range.
Store employees will offer buyers of remaining analogue televisions the option of a digital set-top box to ensure that they are capable of receiving digital broadcasts when the switchover takes place.
An in-store campaign will include information, prominent display materials and trained staff to provide clear, impartial advice on options. The guidance will be designed to assist vulnerable groups, including the elderly.
A third of televisions sold in the UK today are still analogue, according to DSG.
Peter Keenan, managing director of Currys, said: "We are concerned at the high volumes of analogue televisions still on sale in the UK and we favour early transition to a digital only range."
Ford Ennals, chief executive of Digital UK, the independent body coordinating the switchover, said: "Switchover has already started and by 2012 will make digital television standard for all UK households. It's hardly surprising therefore that many consumers will question why analogue products are still being made and sold."
The digital switchover began in Whitehaven, Cumbria in November. The Scottish Borders region will be the first major geographical area to switch to digital transmission later this year.