A TikTok spokesperson called the action "misguided," saying it was based on fundamental misconceptions about the company.
"Following the government's decision to ban TikTok from government devices, the commissions of both the House of Commons and Lords have decided that TikTok will be blocked from all parliamentary devices and the wider parliamentary network," a parliament spokesperson said.
Britain last week banned the app, owned by Beijing-based company ByteDance, on government phones.
"Cyber security is a top priority for parliament," the spokesperson added.
The U.S., Canada, Belgium and the European Commission have already banned the app from official devices.
"We are disappointed that, despite our requests, we have not been offered any opportunity to address concerns and only ask to be judged on facts and treated equally to our competitors," the TikTok spokesperson said in a statement.
The spokesperson added that the company had begun implementing a plan to further protect its European user data, which includes storing UK user data in its European data centers and tightening data access controls.
The British parliament's ban was announced as TikTok's chief executive faced questions from U.S. lawmakers who are convinced the app should be barred for being a potential national security threat to the United States.