The utility model discloses a built -in fitting of building gallows, including the built -in fitting body, the bolt collar of built -in fitting body for having the screw hole is equipped with the shutoff in the interior end of this bolt collar the bolt sleeve nozzle seal the board, have a base at this bolt collar outer end headgear section of thick bamboo wall peripheral hardware, the equipartition has the nail hole to be used for being connected with the template on the base. The nail hole of equipartition is 4 on the base. The utility model has the advantages of safety, efficiency of construction height and precision are high.