Ocean tide water level monitoring device

The invention provides a water level monitoring device for ocean tides. The device comprises a mounting box, a fixing assembly, an auxiliary fixing assembly, a floating assembly, a pressure monitoring assembly and a contact alarm. The rising degree of tide water is monitored in real time according to the pressure fed back by a pressure gauge in the pressure monitoring assembly, and a buoyancy component with buoyancy drives a sliding plate with a rack to move upwards along a sliding groove along with rising of the tide water in the tide rising process; the rising of the water body is only influenced by the up-and-down rising of the water level of the water body and is not influenced by waves; under the condition that waves act on the buoyancy component, wave energy can be consumed due to the meshing relation of the racks, and therefore the situation that the buoyancy component directly floats upwards to form extrusion false alarm due to impact of the waves is avoided. in this way, the situation that the floati