Abstract: 【Objective】To provide reference for applying the technology of sexual pheromone trapping in the actual production and formulate comprehensive control plans for Spodoptera frugiperda(J. E. Smith), this study was performed to evaluate the control effect of sexual pheromone trapping in maize fields as a key technology in the integrated management measures.【Method】Two maize fields in the same growth period and under the same field management conditions were selected as the sex pheromone trapping treatment fields and the control fields, respectively, the areas of which were both about 1.40 ha. Twenty-one sexual traps were set in the treatment fields. In three different periods after the experimental treatment were set, the number of adult trapped in treatment field, the number of laid egg masses and eggs, and the number of larvae at different instars were regularly investigated both in treatment fields and control fields, and the percentages of damaged plants and the damage indexes of larvae were also analyzed, as were used to comprehensively evaluate the control effect of sex pheromone trapping against S. frugiperda in maize fields.【Result】In the sex pheromone trapping treatment(July 15, 2020-July 24, 2020, July 25, 2020-August 2, 2020, August 3, 2020-August 11, 2020, the same below), each trap averagely caught 260.48±21.17, 34.95±3.64, and 7.76±1.45 male adults in three different investigation intervals, respectively. Compared with the control fields, sex trapping obviously reduced the laid eggs of S. frugiperda adults, the larvae density in treatment fields was significantly lower(P<0.05) and the relative larvae decline rates were 42.86%, 88.24%, and 73.08% in the three investigation intervals, respectively. In the treatment process, the number of 4^th instar and older larvae in the control fields was large while 4^th instar and older larvae were not found in the treatment fields. The percentages of damaged plants and the damage indexes of larvae in treatment fields were both decreased obviously in treatment fields, and the corrected control efficacy base on damage indexes in three investigation intervals were 37.13%, 89.78%, and 59.50%, respectively.【Conclusion】Sex pheromone trapping has better effect on field control. Thus, sex pheromone trapping can be used in the integrated management for controlling S. frugiperda, to strengthen its control effect and further reduce the damage in fields obviously.