According to reports, Sachdev was bed-ridden for the past seven months at the Poona Hospital and Research Centre (PHRC).
Veteran journalist and writer Bhawana Somaaya posted on Facebook: "Sad news. Achala Sachdev the beautiful screen mom for whom Balraj Sahani sang in Waqt died peacefully in Pune writes a friend from the hospi."
Sachdev broke her left leg after a fall in her house nearly six months ago.
She also suffered from a brain infarction due to which she lost her vision and movements of upper and lower limbs, media reports said.
Sachdev gained immense popularity by for playing roles of mother and grandmother in Hindi films.
Her most memorable roles include playing actor Balraj Sahni's wife in 1965 film 'Waqt' and Kajol's grandmother in the film 'Dilwale Dulhania Le Jayenge' in1995.
She made her film debut with 'Fashionable Wife' in1938 and acted in over 130 Hindi films in her career.
She charmed the audience by playing some memorable roles in several films like: 'Na Tum Jaano Na Hum', 'Kabhi Khushi Kabhie Gham', 'Chandni', 'Karm' and 'Albela'.