Micro-heat regeneration adsorption type compressed air dryer

The utility model belongs to the technical field of gas adsorption type drying equipment, and particularly relates to a micro-heat regeneration adsorption type compressed air dryer which comprises a first drying tower and a second drying tower, and a pipeline connected to the bottom of the first drying tower and the bottom of the second drying tower is connected with an air inlet pipe through a three-way electromagnetic valve. A first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve are installed on a pipeline with bridge type connection, the pipeline with bridge type connection is connected with the top of the first drying tower and the top of the second drying tower, and a pressure reducing valve, a pressure reducing gas tank, an electric heater anda temperature sensor are sequentially installed on the pipeline with bridge type connection. According to the technical scheme, the three-way electromagnetic valves are installed on the air inlet pipeline, the number of the