A housing of the air pump has a first air inlet, an air inlet passage, an inflation inlet, an air outlet passage and an air outlet. The motor has two output shafts, the first fan is connected with one of the output shafts and located at one end of the air inlet passage, and the second fan is connected with another output shaft and located at one end of the air outlet passage. The second and the first fans are configured to rotate at a same direction, and the inflation inlet is located between the first and the second fans. The first switch unit is adapted to connect or disconnect the first air inlet with the air inlet passage, and the second switch unit is adapted to connect or disconnect the air outlet with the air outlet passage. The air pump has simple structure, convenient control and low cost.