多球式系统 是在足球 比赛中，当原本在比赛开始使用的比赛用球被踢出场外时，为让比赛能够快速恢复，因此允许使用其他相同的球种继续进行比赛。

在传统状况下，当举行职业足球比赛时，仅能够使用一颗足球进行比赛，当足球被踢出场外后，比赛就必须喊停，直到等到足球被找回场上，才能够继续比赛。 根据足球比赛的规则，当比赛用球如果发生爆裂或是出现任何的毁损，那颗足球可能会透过“裁判的权威”而被更换，但被踢出场外的足球，也会被更换后继续比赛。然而，有个全新的系统被介绍给了多个由球联盟与协会，就是多球式系统，在多球式系统之中，一场比赛里将有七名手持备用比赛用球的球童站在场边为场上球员提供备用比赛用球而待命。

The Multiball system in football permits a match immediately to resume with another ball when the original match ball goes out of play.

Traditionally, professional football matches employ the use of a single ball, and when the ball leaves the field of play, the game pauses until the ball is returned. According to the Laws of the Game, the ball may be changed on the "authority of the referee" if it "bursts or becomes defective," though typically it will also be replaced if kicked out of the stadium. However, a new system was introduced by some football leagues and associations to increase the number of match balls used per game. In the multiball system, a number of match balls, often seven, are held by ball boys around the edge of the pitch. When one ball leaves the field of play, the nearest ball boy will release another ball to a player, allowing the game to resume immediately. The system is currently used for UEFA European club tournaments, international competitions and the FIFA World Cup. Home teams are free to choose whether to use the system in the English Football League Championship, though the referee may discontinue the system during a match.