During the 1960s and 1970s, Vachkov starred in classic film productions as Torrid Noon (1965), The Tied Up Balloon (1967) both written by Yordan Radichkov, Whale (1970) directed by Petar B. Vasilev, The Kindest Person I Know (1973), The Last Summer (1974) also written by Radichkov, Almost a Love Story (1980), The Truck (1980) and especially his role as Banko in Manly Times (1977) directed by Eduard Zahariev.

He was born as Grigor Vachkov Grigorov on 26 May 1932 in the village of Tranchovitsa, Levski Municipality, Bulgaria.

The TV series Every Kilometer (1969–71), where he plays the role of Mitko the Bomb, brought him a wide popularity.

Vachkov took part in films that gained international success such as The Last Summer (1974) and Manly Times (1977).

He is the father of the actress Martina Vachkova and was a good friend of the writer Yordan Radichkov.