Adjustable plant rhizosphere fertilizing device

The utility model discloses an adjustable plant rhizosphere fertilizing device, which relates to the field of agricultural production equipment and comprises a fertilizer pipe, a material conveying mechanism for conveying fertilizer and a punching mechanism for drilling holes in plant rhizospheres, the punching mechanism comprises an outer barrel and a drill bit, a fixing seat is arranged on the inner wall of the outer barrel, an elastic piece is arranged on the fixing seat, and the drill bit is movably arranged on the lower portion of the outer barrel through the elastic piece; a through groove distributed in the axial direction of the outer barrel is formed in the side wall of the outer barrel, and a height adjusting piece is arranged in the through groove in a sliding mode. A pedal is fixed to the top of the drill bit, and the bent part of the pedal extends out of the side wall of the outer barrel through the through groove. According to the device, the punching depth can be accurately controlled, the hole