The invention relates to a lifting mechanism for a taphole drill. The lifting mechanism comprises a hanging rack, a lifting sleeve connected with the top of the hanging rack and an adjusting screw. The upper portion of the lifting sleeve is placed in an inner cavity of a front end sleeve of a rotation cantilever. A pressing cover is arranged on the upper end face of the front end sleeve. A thread through hole is formed in the top of the lifting sleeve. One end of the adjusting screw penetrates through the pressing cover and the top of the lifting sleeve in sequence to be in threaded connection with the thread through hole of the lifting sleeve to lift the adjusting screw. A horizontal plate is provided with a hinging hole for being hinged to a support. The upper end of the support is hinged to the horizontal plate through the hinging hole. A bottom plate of the support is fixedly connected with a track beam of a drilling machine. A tilting oil cylinder is arranged between the hanging rack and the support. A rod head of the tilting oil cylinder is hinged to the support. The bottom end of the tilting oil cylinder is hinged to the hanging rack. When the hole opening angle of the taphole drill is adjusted, the adjusting screw is directly rotated in the site, the heights of a hanging mechanism and the track beam can be changed, accordingly the effect of hole opening angle adjusting is achieved, and time and labor are saved.