The invention discloses a
workbench flatness detection device, comprising a flat plate, a horizontal
pipe I and a horizontal
pipe II which are vertical to each other are arranged at the middle part ofthe upper end of the flat plate, screws connected by virtue of a
screw thread are arranged at four corners of the lower end of the flat plate and midpoints of long sides, a gear motor I and a bearingblock I are fixed at the lower ends of the two sides of the flat plate, a lead screw I is arranged at the output terminal of the gear motor I, the lead screw I is coincided with a
symmetric axis in the length direction of the flat plate, sliding rails I are arranged at the two sides of the lead screw I in parallel, a strut is arranged at the upper end of each sliding rail I, the struts are fixedon the lower end face of the flat plate, the lead screw I is provided with a movable plate I connected by virtue of a
screw thread, a gear motor II and a bearing block II are respectively fixed at thetwo ends of the movable plate I, a lead screw II is arranged at the output terminal of the gear motor II, a movable plate II connected by virtue of a
screw thread is arranged on the lead screw II, and a
detector is arranged at the lower end of the movable plate II. The
workbench flatness detection device disclosed by the invention controls movement of the detection device in the horizontal direction by utilizing the gear motor I and the gear motor II, flatness is detected by virtue of a dial gauge, an operation method is simple, and detection precision is high.