Portable limit for height alarm device

The utility model provides a portable limit for height alarm device, it includes two mating movable base, install a regulation pole of arranging perpendicularly that can stretch out and draw back from top to bottom on the base, an at least regulation pole upper portion install an infrared ray correlation generator and an audible -visual annunciator, just infrared ray correlation generator and audible -visual annunciator connect in installing the battery in the base through the wire respectively, the base on install the push rod of manual removal base of being used for of putting to one side, the regulation pole by the vertical fixation on the base the lower beam and adjust the turning handle through the centre and meet and have the upper boom, and install infrared ray correlation generator on an upper boom wherein, and all install on two upper booms audible -visual annunciator, it has simple structure, and convenient to use is reliable, mainly ensures through acousto -optic warning that on -the -spot construc