Screw drilling tool with flexible shaft

The utility model discloses a screw drill with a flexible shaft, which is characterized in that an input device comprises an upper sleeve, the bottom of the upper sleeve is connected with an upper positioning cylinder through threads, a driving mechanism is arranged in the upper positioning cylinder, the output end of the driving mechanism is fixedly connected with one end of an upper rotating shaft, and the other end of the upper rotating shaft is fixedly connected with a lower rotating shaft. An input mechanism is arranged at the other end of the upper rotating shaft; the output device comprises a lower sleeve, the top of the lower sleeve is in threaded connection with a lower positioning cylinder, a transmission mechanism is arranged in the lower positioning cylinder, the top of the transmission mechanism is fixedly connected with one end of a lower rotating shaft, and an output mechanism is arranged at the other end of the lower rotating shaft; the steering device comprises an upper limiting seat and a lo