The invention relates to the technical field of navel orange planting auxiliary devices, in particular to a nutritional solution preparing and spraying device for navel orange planting. By means of the nutritional solution preparing and spraying device, much water can be conveniently carried, there is no need to manually mix or stir a configuration agent and water through a stirring bar, and laboris reduced; meanwhile, after the whole nutritional solution preparing and spraying device is moved to the position of a navel orange planting area, the overall placement stability is improved, and the use reliability is improved; there is no need to manually hold a spraying nozzle by hand and spraying a nutritional solution, navel orange trees at different heights can be conveniently sprayed, thespraying effect is improved, and the use limitation is reduced. The nutritional solution preparing and spraying device comprises a configuration box, a bottom plate, four wheels, four left supportingcolumns, four right supporting columns, a water tank, a stirring motor, an installing plate, a fixing plate, a supporting plate, a plurality of fixing anchors, four telescopic slide rods, four connecting springs, a threaded pipe, a threaded rod, a left hydraulic cylinder, a right hydraulic cylinder, a hydraulic station, a left adjusting plate, a right adjusting plate, a placement plate, a left spraying pipe, a right spraying pipe, an upper supporting column, a lower supporting column, an adjusting sleeve and a limiting square column.