Official statistics obtained by the Conservatives give a break down of the reasons these children were excluded.
Some 580 five-year-olds, 300 four-year-olds and 120 three-year-olds were given fixed-term exclusions for attacking another pupil, data shows.
The figures are shocking, say the Tories. The government says it is right schools tackle bad behaviour.
There has been a steady rise in temporary exclusions at primary schools, while permanent exclusions (expulsions) have fallen.
Primary school permanent exclusions - published in June - were down to 980 compared with 1,540 in 1997.
There were 45,730 fixed term exclusions (suspensions) in 2006/7, compared with 43,720 in 2004/5 and 41,300 the year before.
This is the first year that the government has given a breakdown of the reasons for suspensions among various ages of primary school children.
