Composite lathe with grabbing function

The invention relates to the technical field of composite lathes, in particular to a composite lathe with a grabbing function, which comprises a lathe body, a positive main shaft, a reverse main shaft, a first upright post, a second upright post, a first cutter table and a second cutter table, and is characterized in that the first upright post and the second upright post are arranged on the same transverse guide rail mechanism; the device further comprises a detection module and a control module. The detection module is used for detecting the weight of the workpiece before and after machining, the weight of each nitrogen cylinder, the position information of the first stand column, the position information of the second stand column, the vibration information of the first stand column and the vibration information of the second stand column. The control module is used for determining the movable stand column according to the working states of the positive spindle and the reverse spindle, determining the movi