The invention discloses a light source position adjustable plant cultivation shelf which comprises a first fixed rod, a second fixed rod, a third fixed rod, a fourth fixed rod, a cover plate, an uppernutrient solution tank, a lower nutrient solution tank, clamping grooves, light source interfaces, lamp plates, nursery sites and a power supply line. The clamping grooves are formed in the fixed rods with different heights, the light source interfaces are formed in two ends of different layers of clamping grooves, positions of the lamp plates are adjusted, difference of requirements of differentkinds of plants or different growth stages of the same plant for light intensity can be met, the lamp plates and the nursery sites are inserted into the clamping grooves at suitable heights accordingto the requirements of the light intensity, the plant cultivation shelf can be designed into a multi-layer shelf to be used, and various practical functions of the plant cultivation shelf are achieved.