An over-temperature steam detection control method of a steam box is characterized by comprising the following steps: 1, feeding water; 2, judging whether the water level is reached; 3, judging whether the temperature is lower than T1 or not; 4, allowing a top heating film, a bottom heating disc and a steam generator to work in a full-power mode; 5, judging whether the temperature is lower than T2or not; 6, allowing the top heating film, the bottom heating disc and the steam generator to work in a full-power mode; 7, allowing the top heating film, a back heating pipe and the bottom heating disc to work at full power, and allowing the steam generator to work at specific power; 8, judging whether the temperature reaches T or not; 9, stopping the steam generator, and detecting the bottom temperature; 10, judging whether water is accumulated or not; 11, allowing the bottom heating disc to work at a specific power; 12, judging whether the temperature is less than or equal to T3; and 13, allowing the top heating film to work at full power, and the back heating pipe and the bottom heating disc to work at a specific power. The over-temperature steam detection control method has the advantages that heating elements are additionally arranged to conduct secondary heating on steam, different temperature intervals are set to control different heating devices respectively, the heat efficiency is higher, and accumulated water in a cavity is effectively reduced.