The invention discloses a method for detecting content of sodium cyclamate in food. The method comprises steps as follows: (1), to-be-detected food, sodium chloride, trichloroacetic acid and sodium nitrite are mixed and left to stand; (2), a mixture obtained in the step (1) is mixed with n-hexane and sodium chloride, then a mixture is obtained and subjected to centrifugation, and a supernatant is collected; (3), the supernatant is subjected to chromatographic detection, and the content of sodium cyclamate in the to-be-detected food is determined on the basis of a detection result. The method for detecting the content of sodium cyclamate in the food has at least one of the following advantages: high accuracy, high degree of precision, high stability and low limit of detection.