The invention discloses a greening spray planting method. Firstly, planting grooves are built manually, flowering shrubs are planted in a dibbling mode, then rivets for a three-dimensional net are laid for fixation, and the three-dimensional net plays a role in supporting a skeleton integrally formed by a planting base material and slopes; secondly, a specially-manufactured soil dressing spray planting machine is used for spraying a mixture which is stirred evenly to the governed slopes. The shrubs and herbs are mainly used in slope vegetation cover, flowers are interspersed to increase the beautifying effect, the slopes are in a three-dimensional greening state, strong root systems of slope vegetation can go deep into the slopes, the slopes are connected into an organic whole, branches of the vegetation can protect the slopes against direct washing of rainwater, and therefore the purposes of preventing water and soil losses, stabilizing the slopes and restoring the ecology are achieved. According to the greening spray planting method, the key technological problem of rock slope greening is solved, the shrubs can be stably grown on the rock slopes to form rich greenery landscape effects, and the problems of water and soil losses, the difficulty of greening and low ecology benefits of the rock slopes are solved quite effectively.