The gas chromatography analysis method of aldehyde volatile compounds is established. Through the random purchase of security door, woody fire door and other products from the market, using homemade "whole door free formaldehyde collection machine" to collect and release gas, which was dissolved in water through the pore diameter of 0.45 m machine filter film filtration, using gas chromatograph sample test, the study found: 1.from the random selection of security door, fire door, wooden door on the market have a certain degree of volatile aldehyde gas; 2.security door, wooden fire door three volatile aldehyde gases for formaldehyde, acetaldehyde, acrolein, butyl; 3.the fire door formaldehyde content is the highest.