The utility model discloses a measuring catheter frame platform structure inclination's device belongs to the marine technology field. Its technical scheme does: a measuring catheter frame platform structure inclination's device, including take over a business 4, hemisphere casing 1 and hoist cable 3, it is the cylinder to take over a business 4, take over a business 4 times fixed surface and connect the decurrent three -legged support in summit 8, the summit of three -legged support 8 is in take over a business on the 4 central plumb lines, fixed connection no. 1 passes the stereoplasm jib 9 of the hemisphere casing centre of sphere on the 1 inboard summit of hemisphere casing, 3 one end fixed connection in the hoist cable are on the summit of three -legged support 8, the other end and the upper end of jib 9 of hoist cable 3 are connected, the internal surface of hemisphere casing 1 indicates longitude and latitude 2, the centre of a circle department of taking over a business 4 lower surface is provided with laser emitter 7. The beneficial effects of the utility model are that: the utility model discloses can be the faster more accurate inclination who measures the platform jacket. The cost is not high and be convenient for install.