The 30-year-old lady died on the scene of the horrific crash. The six kids, together with a child, have been trapped and badly injured.
Emergency crews have been referred to as to the scene on Goomalling-Toodyay Highway close to Irish-City Highway at Wongamine, about two hours north-west of Perth, at 6.10am.
The youngsters have been freed by firefighters and 4 have been flown to Perth for pressing therapy.
The opposite two kids have been taken by ambulance.
Their pet canine can also be believed to be lacking.
The youngest of the kids is one and the oldest is 14.
Two of the kids have been in a important situation on Wednesday night time and the others have been secure.
The 58-year-old cement truck driver managed to flee critical accidents.
The highway was closed for the day as main crash detectives seemed for clues to how the tragedy unfolded.