As Chinese military pressure on the democratic island intensified in recent years, Taiwan has been ramping up defence spending.

But Washington, Taipei's biggest arms supplier, has been pushing it to do more.

The ministry is working on a special budget of between NT$800 billion and NT$1 trillion ($26 billion and $33 billion) over seven years, said Wang Ting-yu, who belongs to President Lai Ching-te's Democratic Progressive Party.

The final amount has not been finalised as Taiwan negotiates with the United States over potential arms sales that would be included in the special budget, Wang told AFP in an interview this week.

"We want to build a complete defence ecology to defend our country," said Wang, describing the plans as a "huge" upgrade to the island's self-defence capabilities.

Wang said the plans included integrating Taiwan's air defence systems; acquiring from overseas partners more advanced technology to detect small drones, rockets and missiles and ensure a rapid response to an attack; and increasing the island's capacity to produce and store ammunition for wartime.

Taiwan lives under the constant threat of invasion by China, which claims the self-ruled island is part of its territory and has threatened to seize it by force.

"China is developing their fifth-generation fighters and they're using stealth technology in all kinds of drones or missiles," said Wang, who sits on the parliamentary Foreign Affairs and National Defence Committee.

"So we need more advanced sensor systems, more advanced radar systems -- if you cannot detect it, all kinds of fire units are useless."

Wang's remarks came as Taiwan seeks to strike a deal with the United States to reduce US President Donald Trump's 20 percent tariff on the island's shipments.

Taipei has been eager to show Trump it is serious about shoring up the island's defences, which would be no match for China's firepower in a conflict.

Lai's government announced last month plans to boost its 2026 defence budget to NT$949.5 billion, or more than three percent of gross domestic product.

It aims to increase spending to five percent of GDP by 2030.

Asked if he hoped the special defence budget plans would help Taiwan in the trade negotiations, Wang replied: "Yes".

Taiwan's defence ministry declined to comment when contacted by AFP.

If the cabinet approves the spending plan, it will have to be passed by the opposition-controlled parliament before it can take effect.