Crown block with locking function and control method thereof

The invention relates to the technical field of automatic wafer carrying, in particular to a crown block with a locking function and a control method of the crown block. The crown block comprises a lifting driving part and a grabbing part located below the lifting driving part, the lifting driving part comprises at least two longitudinally-telescopic belts, a transversely-telescopic locking piece and a guide structural piece with a longitudinal through groove, the belts penetrate through the longitudinal through groove, and the locking piece and the guide structural piece are adjacent to an opening, opposite to a transverse groove, of the locking piece; the top of the grabbing part extends upwards to be provided with at least two rigid belt connecting pieces, a lock hole which penetrates in the transverse direction or is concave in one side is formed between the top connecting end and the bottom end of each belt connecting piece, and the top connecting ends and the lock holes can enter the longitudinal throug