For each tier's tournament, the first-placed team was promoted to a higher division, while the last-placed team was relegated to a lower division.

The Division I A tournament was played in Füssen, Germany, from 9 to 15 December 2018.

4 referees and 7 linesmen were selected for the tournament.

GP = Games played; G = Goals; A = Assists; Pts = Points; +/− = Plus–minus; PIM = Penalties In Minutes Source: IIHF.com (minimum 40% team's total ice time) TOI = Time on ice (minutes:seconds); GA = Goals against; GAA = Goals against average; Sv% = Save percentage; SO = Shutouts Source: IIHF.com The Division I B tournament was played in Tychy, Poland, from 8 to 14 December 2018.

GP = Games played; G = Goals; A = Assists; Pts = Points; +/− = Plus–minus; PIM = Penalties In Minutes Source: IIHF.com (minimum 40% team's total ice time) TOI = Time on ice (minutes:seconds); GA = Goals against; GAA = Goals against average; Sv% = Save percentage; SO = Shutouts Source: IIHF.com