Portable flatness detection device for municipal engineering

The utility model relates to the technical field of constructional engineering, and discloses a portable flatness detection device for municipal engineering, the left side of a machine body is provided with a fixing device, the right side of the machine body is fixedly provided with a pasting disc, the interior of the machine body is provided with a metal rotating frame, and the interior of the metal rotating frame is provided with a rectangular storage cavity. The pasting disc is pasted on the wall by holding the handle, the wall surface extrudes the detection columns at different positions, then the pointer is driven to move back and forth in the groove in the scale plate to detect the wall surface, the problem that only small-range detection can be carried out on the wall surface is effectively solved, the efficiency of the device for detecting the flatness of the wall surface is improved, and the device is simple in structure and convenient to use. The wall surface flatness marking device is simple in str