The 1969–70 Nationalliga A season was the 32nd season of the Nationalliga A, the top level of ice hockey in Switzerland. Eight teams participated in the league, and HC La Chaux-de-Fonds won the championship.
| Pl. | Team | GP | W | T | L | GF–GA | Pts | |
|---|---|---|---|---|---|---|---|---|
| 1. | HC La Chaux-de-Fonds | 14 | 11 | 1 | 2 | 77:32 | 23 | |
| 2. | HC Servette Genève | 14 | 8 | 3 | 3 | 65:45 | 19 | |
| 3. | HC Sierre | 14 | 7 | 3 | 4 | 57:48 | 17 | |
| 4. | SC Langnau | 13 | 7 | 0 | 7 | 68:61 | 14 | |
| 5. | EHC Kloten | 14 | 5 | 4 | 5 | 68:67 | 14 | |
| 6. | SC Bern | 14 | 5 | 1 | 8 | 51:65 | 11 | |
| 7. | Zürcher SC | 14 | 3 | 3 | 8 | 51:76 | 9 | |
| 8. | EHC Visp | 13 | 2 | 1 | 11 | 34:77 | 5 |
| Pl. | Team | GP | W | T | L | GF–GA | Pts (B) | |
|---|---|---|---|---|---|---|---|---|
| 1. | HC La Chaux-de-Fonds | 8 | 8 | 0 | 0 | 49:15 | 19(3) | |
| 2. | SC Langnau | 8 | 5 | 1 | 2 | 43:28 | 11(0) | |
| 3. | EHC Kloten | 8 | 3 | 1 | 4 | 39:44 | 7(0) | |
| 4. | HC Servette Genève | 8 | 2 | 0 | 6 | 29:41 | 6(2) | |
| 5. | HC Sierre | 8 | 1 | 0 | 7 | 24:56 | 3(1) |
| Pl. | Team | GP | W | T | L | GF–GA | Pts (B) | |
|---|---|---|---|---|---|---|---|---|
| 1. | Zürcher SC | 4 | 2 | 1 | 1 | 19:8 | 6(1) | |
| 2. | EHC Visp | 4 | 2 | 1 | 1 | 10:17 | 5(0) | |
| 3. | SC Bern | 4 | 0 | 2 | 2 | 6:10 | 4(2) |