The utility model discloses a multi-gas path and low-boiling point gas catalytic reaction experiment device which comprises a raw material supply unit, a raw material mixing unit, a reactor unit and a product gas-liquid separation unit. With the adoption of the multi-gas path and low-boiling point gas catalytic reaction experiment device, propane is converted into acrylic acid, and catalyst calcination, activating treatment and catalyst deactivation regeneration reaction can be carried out; therefore, the multi-gas path and low-boiling point gas catalytic reaction experiment device has simple process, mature technology and less investment and is easy to realize.