1969–70 in Belgian football

Belgium was already qualified for the World Cup finals, and lost their last qualifying game 4-0 in Yugoslavia. For the finals, Belgium was drawn in Group 1 with host Mexico as well as Soviet Union and El Salvador. They won the first game 3-0 against El Salvador but then lost to Soviet Union and Mexico and so finished 3rd of their group. Mexico and Soviet Union qualified for the quarter-finals.

At the end of the season, K Beringen FC and ASV Oostende KM were relegated to Division II and were replaced by KFC Diest and R Antwerp FC from Division II.
The bottom 2 clubs in Division II (VV Patro Eisden and RRC Tournaisien) were relegated to Division III and were replaced by RAA Louviéroise and AS Eupen from Division III.
The bottom club of each Division III league (RA Marchiennoise des Sports, KVC Zwevegem Sport, RRFC Montegnée and ACV Brasschaat) were relegated to Promotion and were replaced by R Léopold Club Bastogne, FC Dessel Sport, SV Oudenaarde and KSK Tongeren from Promotion.

* Belgium score given first

Key

• H = Home match
• A = Away match
• N = On neutral ground
• F = Friendly
• WCQ = World Cup qualification
• WCFR = World Cup first round
• o.g. = own goal

Standard Club Liégeois beat 17 Nëntori Tirana of Albania in the first round of the 1969–70 European Champion Clubs' Cup (won 3-0 at home, drew 1-1 away) and Real Madrid CF of Spain in the second round (won 1-0 at home, 3-2 away). In the quarter-finals, Standard Club Liégeois lost to Leeds United (lost both legs 0-1) as they did the previous season in the first round of the 1968–69 Inter-Cities Fairs Cup.

K Lierse SK eliminated APOEL FC of Cyprus in the first round of the 1969–70 European Cup Winners' Cup (won 10-1 at home, 1-0 away) but lost in the second round to Manchester City FC (lost 0-3 at home, 0-5 away).

The 3 Belgian clubs who entered the 1969–70 Inter-Cities Fairs Cup were qualified for the first time as the highest-placed teams in the last championship who did not qualify for the other 2 European competitions.
In the first round, R Charleroi SC defeated NK Zagreb of Yugoslavia (won 2-1 at home, 3-1 away), RSC Anderlechtois defeated Valur of Iceland (won 6-0 away, 2-0 at home) and RFC Brugeois defeated CE Sabadell FC of Spain (lost 0-2 away, won 5-1 at home).
In the second round, RSC Anderlechtois beat Coleraine FC of Northern Ireland (won 6-1 at home, 7-3 away), but R Charleroi SC lost to FC Rouen of France on away goals (won 3-1 at home, lost 0-2 away) and RFC Brugeois lost to Ujpest FC of Hungary, also on away goals (won 5-2 at home, lost 0-3 away).
In the third round, RSC Anderlechtois beat Dunfermline Athletic FC of Scotland on away goals (won 1-0 at home, lost 2-3 away) and in the quarter-finals Newcastle United FC, again on away goals (won 2-0 at home, lost 1-3 away). RSC Anderlechtois became the 3rd Belgian club to reach the semifinals of the Inter-Cities Fairs Cup after RU Saint-Gilloise and RFC Liégeois, and became the first Belgian club to reach a European competition final after they beat FC Internazionale (lost 0-1 at home, won 2-0 away).
In the 1970 Inter-Cities Fairs Cup Final, RSC Anderlechtois captained by Paul Van Himst lost to Arsenal FC (won 3-1 at home, lost 0-3 away).