Abstract: To identify the effects of bast fiber mulching film on vegetative growth of pepper in greenhouse, the plant height and number of branches were measured in the main period of vegetative growth, the flowering rate of pepper was measured in the early flowering period, the fruit set percentage of pepper was measured in the early fruiting period, the total yield was measured in the fruiting period, the dry matter accumulations and the nutrient accumulations of vegetative organs were measured in late growth stage of four treatments with different mulching film. The results showed that the height of pepper with white bast fiber mulching film was the highest among these treatments, the number of branches was the maximum excluding the sample obtained on May 2nd; the dry matter accumulations and the nutrient accumulations of vegetative organs with white bast fiber mulching film were the maximum among these treatments; the flowering rate with white bast fiber mulching film was 53.34% higher than that with no coverage, and the fruit set percentage with white bast fiber mulching film was the maximum among these treatments; the total yield with white bast fiber mulching film was 31.20% higher than that with no coverage. Conclusion was drawn that bast fiber mulching film could promote the vegetative growth of pepper, had no adverse effects on reproductive growth of pepper, and could increase the total yield of pepper.