The invention relates to a data recorder of a smoke component analyzer. The data recorder comprises a housing and a display screen, a working-state transition display lamp, a working-mode transition button and a control operation button which are installed on the housing. A circuit board mounted inside the housing contains a control module connected with all the buttons, the display lamp and the display screen on the housing. The control module is connected with a SD memory card and an acquisition and record module. The acquisition and record module is connected with a digital communication module and an analog conversion module. The digital communication module is connected with a digital quantity interface of a S700 series smoke component analyzer. The analog conversion module is connected with an analog quantity interface of the S700 series smoke component analyzer. A power module provides 5 V power for the whole circuit. According to the invention, workload of testers is reduced greatly; time for test data recording and summarizing is shortened; faults are minimized; and work efficiency of the whole test is raised.