Motorists were sharing images of the tailbacks caused by the fire last night.
A firefighter who attended the incident, Matt Butler, later shared photos of the lorry on Twitter and said: "Attended a lorry fire this evening on the A14.
"Bulk quantities of aerosols involved in the fire causing projectile hazards causing West/East bound carriages to be closed whilst Northants Fire tirelessly brought the incident to a safe conclusion assisted by Highways England."
Highways England were updating motorists on Twitter and at 8pm said: "Traffic has been stopped on the A14 west between J11 and J10 due to a lorry fire. Northants Fire on scene, traffic officers en-route."
Both directions of the A14 between junction 10 at Burton Latimer and junction 11 at Cranford were later closed while firefighters tackled the lorry blaze.
By 11pm, the eastbound route was open but firefighters continued to work on the LGV.
The carriageway was fully open in both directions by 4.30am this morning.