[Objective] According to the low water and fertilizer use efficiency in the protected vegetable production, the influences of different fertigation treatments on the dry matter accumulation and nutrient absorption of greenhouse pepper were researched to provide scientific evidence for pepper sustainable production in Gansu Province.[Methods] Field testing was conducted. In which, normal furrow fertilizing was used as control (T₁), fertigation technology (T₂) was carried out to demonstrate its influence on dry matter accumulation and nutrients absorption of Long Pepper No.3 in a solar greenhouse.[Results] (1) Fertigation technology can promote pepper plant's dry matter accumulation significantly, dry matter accumulation increased by 9.21%, dry matter accumulations in fruits and roots increased by 22.47% and 7.29%. The first dry matter equilibrium was advanced by 30 days than normal, while 2nd equilibrium stage was postponed about 41 days. (2) In treatment T₂, the absorption accumulations of N, P₂O₅, K₂O increased by 18.23%, 30.73%, 19.76%, and the N, P₂O₅, K₂O proportion of fruits increased by 9.73%, 13.70%, and 13.00% respectively than the ones of treatment T₁. (3) In comparison with the ones in T₁, the N, P, K use efficiencies of treatment T₂ increased 51%, 43.3%, 71.2% respectively. Furthermore, the treatment T₂ can save 48.9% water, increase 22.1% yield, and increase 3.55×10⁴ yuan/hm² income than treatment T₁.[Conclusion] Fertigation technology can increase the dry matter and nutrients accumulation in pepper, and can increase the allocation proportion of them in fruits.