Movable telescopic vertical shaft derrick and working method thereof

The invention discloses a movable telescopic vertical shaft derrick and a working method thereof. The movable telescopic vertical shaft derrick comprises a base; a movable adjusting mechanism is installed on the lower portion of the base; a first derrick and a first height adjusting mechanism are installed on the upper portion of the base; the upper portion of the first derrick is movably sleeved with a second derrick; the first height adjusting mechanism is connected with the first derrick and the second derrick; a second height adjusting mechanism is installed on the second derrick; a sliding beam is arranged in the second derrick in a sliding mode; and the second height adjusting mechanism is connected with the sliding beam. According to the movable telescopic vertical shaft derrick and the working method thereof, by designing a two-stage range extending mechanism, the overall height of the derricks is controlled and adjusted, an operation space is provided for mounting and dismounting of a drilling machin