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This utility model discloses a foliar fertilizer spraying device, belonging to the field of agricultural equipment. It includes a pusher frame for supporting the foliar fertilizer spraying process. One end of the pusher frame is welded with an I-shaped frame. A forward-rotating motor and a reverse-rotating motor are installed on the top of the I-shaped frame. The output shafts of both motors are connected to lead screws via couplings. A limit groove is installed on one side of the I-shaped frame. Hollow columns are welded to the transverse inner walls of the I-shaped frame, and springs are installed inside each hollow column. One end of each spring is connected to a moving column. One end of each moving column is equipped with a contact point one. Two contacts are symmetrically installed on the transverse inner walls of the I-shaped frame. An arc-shaped plate is installed at the other end of each moving column. A guide column is welded to one side of the I-shaped frame. This foliar fertilizer spraying device can spray reciprocally, resulting in more uniform nutrient absorption and improved tobacco growth.