[Objectives] This study was to find out the effect of trap space layout on the trapped number of Spodoptera litura in tobacco field. [Methods] From 2015 to 2017, investigations were made using different hanging heights, distances (densities) and equidistant plane layout in the tobacco planting area in central Guizhou Province. [Results] The trapped number of S. litura was different at different hanging heights of the trap, and some had the difference reached the 5% significant level in the trapped number. The optimum hanging height was 1.5 - 2.0 m. The trapping effect was the best at the field layout distance of 20.0 - 30.0 m (density of 5 - 8 traps/hm²). Under the conditions of even distribution at the equal distance between traps of 40.0 min the field, the accumulated trapped number of S. litura from April to August was in the order of outer ring > central ring > inner ring, presenting the zonal distribution. The difference in the trapped numbers was significant among different rings, reaching the 5% significant level. [Conclusions] This study provided theoretical bases for the physiochemical control of S. litura in tobacco field. [ABSTRACT FROM AUTHOR]