Device and method for recognizing working state of spindle of numerical control machine tool

The invention discloses a numerical control machine tool spindle working state recognition device and method, and belongs to the field of numerical control machine tools, the numerical control machine tool spindle working state recognition device comprises an inner part and an outer part, and the outer part movably sleeves the inner part; the inner part comprises a middle pipe and two side plates, the two side plates are connected to the two ends of the middle pipe, and fixing parts are arranged on the sides, away from each other, of the two side plates; a plurality of detection parts are arranged on the inner wall of the outer part, each detection part comprises a telescopic part and an elastic part, the telescopic parts are sleeved with the elastic parts, the two ends of each elastic part abut against the outer wall of the middle pipe and the inner wall of the outer part respectively, the fixing part comprises two stretching blocks and two pressing parts, one side of each stretching block is connected to th