Objective To develop a community-based colorectal cancer screening promotion program based on implementation mapping theory and evaluate its effectiveness. Methods Based on previously identified facilitators and barriers to colorectal cancer scree-ning among community residents, the CFIR-ERIC matching tools, literature analysis, and focus group interviews were employed to identify andintegrate implementation strategy elements.A dual-track collaborative screen ing promotion program was developed based on the integrated screening action model (I-SAM), with the "Jian Shai Tong" mini-program serving as the digital intervention platform.From March to August 2025 , a quasi-experimental design was conducted, 150 permanent residents from 2 communities were conveniently selected as the control group and given routine colorectal cancer screening health education; 150 permanent residents from another 2 communities were selected as the intervention group and given health education based on the implementation mapping-based community colorectal cancer screening promotion program.Post-intervention, screening completionrates, colorectal cancer knowledge, health beliefs, health literacy, social support, cancer fatalism scores, and program satisfaction were compared between the two groups. Results The intervention group demonstrated significantly greater improvements in screening completion rates, colorectal cancer knowledge, health beliefs, health literacy, social support, and program satisfaction compared to the control group, with significantly lower cancer fatalism scores (all P＜0. 05) . Conclusion The community-based colorectal cancer screening promotion program developed using implementation mapping theory effectively enhanced residents′ screening participation and improved screening-related psychosocial cognition, providing a systematic solution for promoting colorectal cancer scree-ning in community settings.