Timing and fixed-point nanmu timber sampling and detecting device and sampling method thereof

The invention discloses a timed and fixed-point nanmu timber sampling and detecting device. The timed and fixed-point nanmu timber sampling and detecting device comprises a planting box. The planting box is provided with a supporting detection device matched with a nanmu tree trunk, the supporting detection device comprises a detection block for detecting deviation of the nanmu tree trunk and a mounting plate matched with the detection block, the mounting plate is provided with a supporting block capable of supporting the deviated tree trunk, and the mounting plate is provided with an electromagnetic ring matched with the supporting block; the detection block is connected with a sliding rheostat after penetrating through the mounting plate, the detection block is matched with the sliding rheostat through a sliding plate, and the sliding rheostat is connected with an electromagnetic ring. Meanwhile, whether the phoebe zhennan is suitable for transplanting or not is judged by measuring the actual length of the