Objective To investigate the application effect of low-frequency pulsed electrical stimulation combined with sensory integration training in children with motor developmental delay.Methods A total of 88 children with motor developmental delay admitted to our hospital from May 2023 to May 2025 were enrolled and randomly divided into an electrical stimulation group (n = 44) and a combined group (n = 44) using the envelope randomization method. The electrical stimulation group received low-frequency pulsed electrical stimulation, while the combined group received low-frequency pulsed electrical stimulation combined with sensory integration training. Therapeutic efficacy, motor function, developmental status, 10-meter walk test (10MWT), timed stair test (TST), and adverse events were compared between the two groups.Results The total effective rate in the combined group was significantly higher than that in the electrical stimulation group (P < 0.05). After treatment, the Peabody developmental motor scales (PDMS) score in the combined group was higher than that in the electrical stimulation group (P < 0.05), and the pre-to-post-treatment improvement in PDMS score was greater in the combined group than in the electrical stimulation group (P < 0.05). After treatment, the griffiths developmental assessment scales (GDS) score in the combined group was higher than that in the electrical stimulation group (P < 0.05), and the difference in GDS score before and after treatment in the combined group was greater than that in the electrical stimulation group (P < 0.05). After treatment, the 10MWT and TST times in the combined group were lower than those in the electrical stimulation group (P < 0.05), and the differences in 10MWT and TST times before and after treatment in the combined group were greater than those in the electrical stimulation group (P < 0.05). There was no statistically significant difference in the incidence of adverse events between the two groups (P > 0.05).Conclusion Low-frequency pulsed electrical stimulation combined with sensory integration training shows favorable application effects in children with motor developmental delay.