The invention discloses an efficient automatic de-icing system. The system comprises an ice making mechanism, a low-temperature secondary refrigerant mechanism, a high-temperature secondary refrigerant mechanism and an ice-making and de-icing mechanism, wherein the ice making mechanism can provide cooling capacity and heat for the low-temperature secondary refrigerant mechanism and the high-temperature secondary refrigerant mechanism so as to carry out ice making or de-icing, the low-temperature secondary refrigerant mechanism and the high-temperature secondary refrigerant mechanism are used for supplying cooling capacity and heat generated by heat exchange to the ice-making and de-icing mechanism for ice making or de-icing through a secondary refrigerant, and the ice making mechanism comprises a compressor, a shock absorbing pipe, an oil extractor, a condenser, a refrigerant flowing-into liquid storage tank, a drying filter, a liquid tube electromagnetic valve, an expansion valve andan air return filter, wherein the drying filter, the liquid tube electromagnetic valve and the expansion valve communicate with the refrigerant flowing-into liquid storage tank in sequence, and the air return filter is connected with the compressor. The efficient automatic de-icing system has the beneficial effects that a sealing strip is long in service life and good in sealing, the thickness ofmade ice is uniform, system operation is stable, no liquid impact and no oil throwing exist in de-icing and secondary ice making, energy consumption is reduced, assembling is convenient, and the costis saved.