Water floating platform device

The invention discloses an overwater floating platform device which can be provided with an overwater operation platform and comprises a supporting mechanism, a posture adjusting mechanism and a floating body mechanism. The supporting mechanism is composed of an upper platform, a lower platform, an upper supporting column, a lower supporting column and the like, and the upper platform and the lower platform are connected through the upper supporting column. Large inertia change can be generated in the working process of the floating platform, and therefore the mass center and inertia of the system can be effectively adjusted by designing the long lower supporting column. The posture adjusting mechanism is composed of two sets of ball screws, a servo motor and a speed reducer and is connected with the upper platform through connecting pieces such as a hooke joint and a sliding thread sleeve, and according to information fed back by a posture sensor installed on the upper platform, a controller controls the mot