st kilda (3rd) v south (4th)
saints knock swans out by 53 they play blues in the prelim.
| Q1 | Q2 | Q3 | Q4 | Score | Date / Result | Ground | Crowd | ||
| St. Kilda | 6.1 | 9.3 | 14.8 | 22.11 | 143 | Sat 5-Sep-1970 2:30 pm | M.C.G. | 104,239 | |
| South Melbourne | 2.5 | 9.8 | 10.10 | 13.12 | 90 | St. Kilda won by 53 points | |||
collingwood (1st) v carlton (2nd)
pies beat blues by 10 to make grand against blues or saints.
| Q1 | Q2 | Q3 | Q4 | Score | Date / Result | Ground | Crowd | ||
| Collingwood | 5.2 | 9.7 | 12.11 | 17.16 | 118 | Sat 12-Sep-1970 2:30 pm | M.C.G. | 112,838 | |
| Carlton | 5.0 | 9.2 | 14.3 | 17.6 | 108 | Collingwood won by 10 points | |||
prelim final
carlton v st kilda