The invention discloses a drilling mechanism. The drilling mechanism comprises a base, at least two stand columns fixed on the base, and a drill bit part which is arranged on the stand columns, wherein the stand columns are parallel to each other; the drill bit part can axially move along the stand columns; the drilling mechanism further comprises a hinging seat fixed on the stand columns and a pressing handle with one end hinged to the hinging seat; the pressing handle is a bent rod with an inflection point; the pressing handle is further provided with a pressing handle groove and the pressing handle groove is formed between the connection end of the pressing handle and the inflection point; a pressing wheel is further arranged in the pressing handle groove and the position of the pressing wheel in the pressing handle groove can be adjusted; the drill bit part is provided with through holes with the quantity which is the same as that of the stand columns; each of the stand columns is located in one through hole; the stand columns and the though holes which are mutually matched are in clearance fit; the stand columns are provided with springs for supporting the drill bit part in a sleeving way; the pressing wheel is in contact with the upper end face of the drill bit part. The drilling mechanism is simple in structure and the feeding amount of the drill bit can be conveniently controlled.