Underground engineering external water pressure monitoring rapid installation device and application method

The invention provides an underground engineering external water pressure monitoring rapid installation device and an application method, and relates to the technical field of pressure monitoring. The underground engineering external water pressure monitoring rapid installation device includes an outer sleeve, a water control assembly and a hollow shaft rod movably connected with the water control assembly are arranged in the outer sleeve, and the water control assembly is movably connected with the outer sleeve; the two ends of the hollow shaft rod are further provided with a sand filtering and water permeating assembly and an anti-explosion gland assembly respectively, and the hollow shaft rod communicates with the water control assembly through the sand filtering and water permeating assembly. A mounting assembly is further arranged on the outer wall of the outer sleeve; the method and the device which are simple in structure, quick to mount and convenient to maintain are attached to the fixed steel plate,