The 1949–50 Klass B season was the third season of the Klass B, the second level of ice hockey in the Soviet Union. 19 teams participated in the league, and HC Spartak Minsk won the championship and was promoted to the Soviet Championship League.
First round
Zone 1
| Club | GP | W | T | L | GF | GA | Pts | |
|---|---|---|---|---|---|---|---|---|
| 1. | MWO Moscow | 12 | 12 | 0 | 0 | 79 | 19 | 24 |
| 2. | Torpedo Gorky | 12 | 8 | 2 | 2 | 41 | 25 | 18 |
| 3. | Dynamo Voronezh | 12 | 5 | 3 | 4 | 35 | 26 | 13 |
| 4. | Spartak Ivanovo | 12 | 5 | 3 | 4 | 38 | 44 | 13 |
| 5. | Spartak Voronezh | 12 | 3 | 1 | 8 | 23 | 38 | 7 |
| 6. | Bolshevik Moscow | 12 | 2 | 2 | 8 | 19 | 46 | 6 |
| 7. | Lokomotive Kharkiv | 12 | 1 | 1 | 10 | 23 | 60 | 3 |
Zone 2
| Club | GP | W | T | L | GF | GA | Pts | |
|---|---|---|---|---|---|---|---|---|
| 1. | Dynamo Chelyabinsk | 12 | 10 | 1 | 1 | 62 | 25 | 21 |
| 2. | Dynamo Novosibirsk | 12 | 10 | 0 | 2 | 72 | 19 | 20 |
| 3. | ODO Novosibirsk | 12 | 7 | 2 | 3 | 71 | 26 | 16 |
| 4. | Krasnaya svezda Krasnokamsk | 12 | 5 | 0 | 7 | 32 | 52 | 10 |
| 5. | Gorod Molotov | 12 | 4 | 1 | 7 | 25 | 45 | 9 |
| 6. | Spartak Sverdlovsk | 12 | 3 | 2 | 8 | 38 | 54 | 8 |
| 7. | Metallurg Stalinsk | 12 | 0 | 0 | 12 | 8 | 87 | 0 |
Zone 3
| Club | GP | W | T | L | GF | GA | Pts | |
|---|---|---|---|---|---|---|---|---|
| 1. | HC Spartak Minsk | 8 | 7 | 1 | 0 | 17 | 10 | 15 |
| 2. | ODO Riga | 8 | 4 | 1 | 3 | 32 | 18 | 9 |
| 3. | Spartak Leningrad | 8 | 4 | 0 | 4 | 31 | 24 | 8 |
| 4. | ODO Leningrad | 8 | 3 | 0 | 5 | 31 | 29 | 6 |
| 5. | Inkaras Kaunas | 8 | 1 | 0 | 7 | 11 | 41 | 2 |
Final tournament
| Club | GP | W | T | L | GF | GA | Pts | |
|---|---|---|---|---|---|---|---|---|
| 1. | HC Spartak Minsk | 5 | 3 | 2 | 0 | 18 | 8 | 8 |
| 2. | ODO Riga | 5 | 3 | 1 | 1 | 21 | 15 | 7 |
| 3. | MVO Moscow | 5 | 3 | 0 | 2 | 22 | 11 | 6 |
| 4. | Dynamo Chelyabinsk | 5 | 2 | 1 | 2 | 9 | 15 | 5 |
| 5. | Dynamo Novosibirsk | 5 | 1 | 0 | 4 | 9 | 18 | 2 |
| 6. | Torpedo Gorky | 5 | 1 | 0 | 4 | 12 | 24 | 2 |