The study targeted to find the pragmatic relation on mediating role of Safety Climate (SCL) and Safety Worker Behavior (SWB), and moderating role of Safety Training (ST) for better Safety Performance (SP). The target area of the study is on construction firms in developing countries like Nepal. A structured questionnaire tool was applied to conduct the survey. Out of 350 response targets, only 293 respondent’s data were analyzed using statistic SPSS 23 and were empirically tested using AMOS 23. The analysis explored complementary partial mediation of the mediating variable SCL and SWB between Safety Culture (SCU) and Safety Performance (SP). Besides, the study also showed how ST moderated the relation between SWB & SP and justified the insignificant moderation role of ST on relation between SCL& SP This research shed the light on the mediating impact of SCL and SWB adding the moderation relation of ST on the effective safety performance in the construction firms. Besides, this industrial approach research will widen and improve the literature of SP in construction firms in developing nations in modernizing the policy. Consequently, this study would widen the knowledge of policymakers prompting effective safety performance in the construction project.