The rocky slope greening planting pit comprises a slope body and a water storage pool, a planting groove is formed in the slope body transversely and obliquely downwards, a partition plate is arrangedin the planting groove, the partition plate divides the planting groove into a planting chamber and a water storage chamber, and a plurality of permeation holes are formed in the lower end of the partition plate in a penetrating mode. A plurality of drainage holes are horizontally formed in the outer side wall of the planting chamber; flow guide grooves are vertically formed in the two sides of the planting groove, and water outlets communicating with the water storage chamber and the corresponding flow guide grooves are formed in the upper ends of the side walls of the two ends of the waterstorage chamber; a water storage tank is arranged at the slope toe of the slope body, each diversion trench is communicated with the water storage tank, and the water storage tank is communicated withthe reservoir; a water pump is arranged in the reservoir, a water inlet penetrates through the side wall of the water storage chamber and is located above the water outlet, and a drip irrigation pipepenetrates through the water inlet and is connected with the water pump. The greening structure has the effects of preventing the loss of planting soil, saving water and effectively greening and recovering the vegetation of the rock slope.