Raj Kanwar entered the Bollywood as an assistant director through the movie Ram Avtar in 1988. Later, Raj Kanwar took up direction and directed Shahrukh Khan and late Divya Bharti in the movie Deewana in 1992. Shahrukh Khan tweeted, "My friend raj kanwarji passed away. The impermanence of life, makes one feel so helpless. May his soul rest in peace. Aisi Deewangi..miss u sir."
Later, Raj Kanwar wrote scripts for several films and directed films like Jeet, Laadla, Kartavya, Jaan, Itihaas, Daag: The Fire, Badal, Har Dil Jo Pyar Karega, Dhaai Akshar Prem Ke, Humko Deewana Kar Gaye and Andaaz. His last film was Sadiyaan: Boundries Divide Love Unites, which had launched Shatrughan Sinha's son Luv in 2010.