The invention discloses a self-propelled holing and fertilizer application machine for an orchard based on soil softening. The self-propelled holing and fertilizer application machine comprises a body frame driven to travel by a travelling hydraulic motor, a gasoline engine and a hydraulic system, wherein a soil softening, holing and fertilizer application mechanism is arranged at the middle part of the body frame; the soil softening, holing and fertilizer application mechanism is composed of a softening and holing device A and a fertilizer application device B; the softening and holing device A comprises a bidirectional screw rod mounted on bearing seats of two vertical rods of the body frame; the bidirectional screw rod is connected with a holing cylinder mounted in a sliding groove between two cross rods through a linear bearing and a connection seat which are arranged at the left and right ends of the bidirectional screw rod; the fertilizer application device B is mounted in the front part of the body frame and is a container of which the upper part is a fertilizer tank and the lower part is a liquid tank; the fertilizer tank is provided with two fertilizer distributors which are connected with fertilizer application sleeves through pipelines and provided with fertilizer distribution impellers; and the bottom of the liquid tank is provided with a submerged pump and water outlet pipes connected with holing spikes of the fertilizer application sleeves. According to the invention, through the softening and holing device A and the fertilizer application device B of the soil softening, holing and fertilizer application mechanism, soil softening, holing and fertilizer application for fruit trees in the orchard are performed.