The utility model discloses a gas heating spray -drying device based on solar energy mirror surface spotlight, include solar energy specular reflection plane array device, store hot case, bend type copper pipe, air cleaner, draught fan, electric heater and spray drying tower, it is equipped with the conduction oil to store hot incasement, curved type copper pipe sets up is staying hot incasement, and the submergence is in the conduction oil, the one end connection air cleaner of curved type copper pipe, the other end go into the wind gap with the draught fan and are connected, the draught fan air outlet is gone into the wind gap with motor steam and is connected, electric heater air outlet intercommunication spray drying tower. The utility model provides an actual production in -process too rely on fossil fuel and rely on the predicament that the electricity generates heat completely. Make its manufacturing cost cheaper, the energy is supplied with also cleanlyer. It is big to have changed the energy resource consumption of spray drying trade, low and thick emission of utilization efficiency, serious pollution's not sustainable development's current situation.