The invention discloses an adjusting valve bolt assembling machine which comprises a supporting table. A first motor is mounted on the left portion of the supporting table. A positioning tool is fixed to a shaft of the first motor. A positioning board is fixed to the upper end of the positioning tool. A bolt screwing device is mounted on the right portion of the supporting table. The adjusting valve bolt assembling machine has the advantages of being reasonable in structural design, convenient to use and the like; by means of the bolt screwing device, an adjusting valve bolt is screwed automatically, manual assembling is replaced, the degree of automation is high, the assembling efficiency of the adjusting valve bolt is improved, and the assembling quality of an adjusting valve is ensured.