Energy-saving generator capable of filtering air

The invention provides an energy-saving generator capable of filtering air. The energy-saving generator is reasonable in structural design, low in cost and capable of power generation. The energy-saving generator includes a rack, and an air filtering device is arranged at the left side of the rack and includes a pneumatic device and an air filter; the pneumatic device includes two gears, a chain conveying belt, a first air pump tank and a second air pump tank, wherein the gears are rotatably arranged on the rack, the chain conveying belt is wound on the gears, and the first air pump tank and the second air pump tank are arranged at the two sides of the chain conveying belt respectively; the first air pump tank and the second air pump tank each includes a tank body, a pressure weight and anair bag, wherein tooth rows are formed in the surfaces of the tank bodies, the pressure weights are fixed to the tank bodies, are arranged on the rack and can slidably move up and down, the upper endfaces of the air bags are