Boris Johnson is facing his first Commons rebellion since his general election victory over Huawei's role in the UK's 5G mobile internet network.
A number of senior Conservatives are set to back an amendment which would end the Chinese firm's participation in the project by the start of 2023.
Ministers approved Huawei's involvement in January but capped its share at 35%.
Tory critics say Huawei is an arm of the Chinese state and a risk to UK security - claims the firm rejects.
The government say the Chinese firm will be excluded from the most sensitive parts of the 5G network and that its overall market share will decline over time as new players emerge.
