The invention discloses a dynamic full-angle telescopic installation device of an acousto-optic alarm. The dynamic full-angle telescopic installation device comprises a lifting rod, a top base, an elevation adjusting device and a bottom rotation adjusting and fixing device, wherein the lifting rod comprises an outer rod and an inner rod which stretches in the outer rod; and corresponding lifting fixing holes are formed in the outer rod and the inner rod, a locking pin is inserted into the lifting fixing holes, the upper end of the lifting rod is connected with the top base through the elevation adjusting device, the bottom of the lifting rod is provided with the bottom rotation adjusting and fixing device, the elevation adjusting device is a rotating cup, the bottom rotation adjusting andfixing device comprises an angle adjusting back cap, and a base plate fixing back cap. According to the dynamic full-angle telescopic installation device, the standardization of the installation and operation of on-site safety warning equipment is realized, the labor intensity of operators is reduced, and the construction operation equipment and the personal safety are ensured.