Pedaled air inlet device for melodica and melodica playing system

The utility model discloses a pedaled air inlet device for a melodica and a melodica playing system. The pedaled air inlet device comprises a pedal (1), an inflating air pump (2), a pipeline (4) and a buffering air bag (3), wherein the pedal (1) is pedaled, so that the inflating air pump (2) compresses air in one direction into the buffering air bag (3) and the pipeline (4); the buffering air bag (3) digests the air in the pipeline (4) under the dynamic change of the volume, so that the air can be kept supplying under the condition that the inflating air pump (2) supplies the air intermittently; and meanwhile, under the elastic contraction, the air can be stably supplied to the melodica (5). The blowing playing mode of the melodica is replaced by a pedaling playing mode, so that a phenomenon that an oral cavity is contacted with the melodica is avoided, and the problem about sanitation is solved fundamentally. According to the pedaled air inlet device, a performer plays the melodica easily by leg strength.