Rotary table and engineering machinery

The utility model discloses a rotary table and engineering machinery, the rotary table comprises a fixed seat, a rotary table body, a rotation driving piece, a shaft angle encoder and a detection mechanism, and the fixed seat is provided with a pair of middle positions; the rotary table body is located on the fixing base. Positioning pieces are installed on the periphery of the rotary table body. The rotary driving part is mounted between the fixed seat and the rotary table body and is connected with the bottom of the rotary table body; the shaft angle encoder is connected to the rotary driving piece and is provided with an angle return-to-zero position; the detection mechanism is installed at the centering position and used for detecting the position of the positioning piece when the right opposite angle of the reading end of the shaft angle encoder returns to the zero position. According to the utility model, through the shaft angle encoder, the positioning piece and the detection mechanism, the centering p