A total of 11 properties across Hounslow and Feltham were raided on the morning of Wednesday November 9 and various drugs were seized.
The nine suspects, who are all men, were arrested on suspicion of a range of offences, including possession with intent to supply Class A drugs, possession with intent to supply Class B drugs and an assault on police. One cannabis warning was also issued.
All nine remain in custody at police stations in London.
Around 100 officers took part in the intelligence led operation, including local borough officers, officers from specialist units as well as search dogs.
It is all part of a wider active initiative called Operation Volturnus which was launched on Thursday September 29 to combat drugs in Hounslow.
A total of 45 arrests have so far been made as part of the operation and significant quantities of controlled drugs and cash have been seized.
"Our aim is to reassure the community"
Chief Inspector Wayne Matthews said it is all in a bid to make Hounslow a safer place for the local community.
He told getwestlondon : "We know that drugs are primarily a driver of crime on the borough.
"It's something which Hounslow borough has committed to dealing with, because we recognise the importance and we also know that it affects community confidence.
"Our aim really is to reassure the community, that we're doing all we can in our fight against crime and also the fight against drugs.
"We want Hounslow to be as safe as possible for our communities to live, work and visit.
"My plea to the public is if you have any information in relation to drug dealing or any criminal activity to please call 101, Crimestoppers, or get in touch with us here at Hounslow Police."
You can contact Crimestoppers anonymously on 0800 555 111.
Keep up to date with the latest news in west London via the free getwestlondon app.
You can even set it to receive push notifications for all the breaking news in your area.