Labor has accused the Federal Government of rebranding the China free trade deal as an "export agreement", to make the decision more palatable to the electorate.

The major parties have been engaged in a fierce slanging match over the merits of the deal for weeks.

Labor has argued Australian jobs are at risk, because there are insufficient safeguards to ensure local workers are picked for projects over Chinese workers.

The Coalition maintains the workplace protections are no different to free trade agreements with Japan and Korea — agreements Labor helped negotiate.

In Question Time, Coalition MPs asked repeated questions of senior ministers about the benefits that would flow from the China export agreement.

It led to significant heckling from the Opposition benches.

"I wondered if the Minister could tell us if any imports are allowed under the China export agreement he's just told the House about," Labor MP Julie Collins asked.

Trade Minister Andrew Robb dismissed the criticism, and said the use of the word "export" was absolutely valid.

"It's an export agreement, it's an export agreement, don't you understand?" Mr Robb replied.

"This is the level that we have — that the Opposition have taken this debate."

Mr Robb demanded to know why Labor MPs were directing their questions at other ministers, when he was the one responsible for the negotiations.

"If you're so concerned about it, why don't you ask the person who negotiated this agreement about the details?" he asked.

"I'll tell you why, if you shut up.

"The reason is that you have not identified one thing in the worker protection area that is not the same as what applied under your government, not one thing."