A suspended ceiling structure for a refrigerated storage and a construction method thereof are provided. The suspended ceiling structure comprises a ceiling grid which comprises a main grid, hanging members and an attachment grid. An insulating strip made of polyurethane foam is placed on the main grid so as to serve as a cushion block. An upper color-coated steel sheet is provided above the insulating strip and a lower color-coated steel sheet is arranged below the main grid. A thermal break component is arranged between the main grid and the lower steel sheet, and a polyurethane insulating material is sprayed in successive layers between the upper and lower color coated steel sheets. The ceiling structure can improve the insulation effect of the refrigerated storage and save energy.