The invention provides a nose landing gear cabin structure of a seaplane, and belongs to the technical field of aircraft fuselage structure design, a watertight front end frame of the structure is connected with a right side wall plate, a left side wall plate and an inclined cover plate and ensures sealing, and a cabin door uplock support is arranged on a web plate; an upper cross beam is mounted on the inclined cover plate; the rear supporting truss is used in cooperation with the front supporting truss and supported on the left side wall plate and the right side wall plate at the same time. The upper cross beam is positioned above the top inclined cover plate, and two ends of the upper cross beam are connected with the vertical beams to form a continuous transverse reinforcing beam assembly; the front landing gear rotating shaft bearing mounting seat is arranged between the two vertical beams, the longitudinal beams are arranged on the outer side of the right side wall plate and correspond to the front landing gear rotating shaft bearing mounting seat, and the longitudinal beams are connected to the vertical beams, so that the problems that a seaplane front landing gear cabin door folding and unfolding locking mechanism is large in size and small in mounting space of a V-shaped ship bottom are solved, and the seaplane front landing gear cabin door folding and unfolding locking mechanism is simple in structure and convenient to use. And the adverse effect on the gravity center caused by taking off with water can be avoided.

本申请提供一种水上飞机前起落架舱结构，属于飞机机身结构设计技术领域，该结构的水密前端框与右侧壁板、左侧壁板、斜盖板连接并保证密封，腹板上布置有舱门上位锁支座；斜盖板上安装有上横梁；后支撑桁架与前支撑桁架配套使用，同时支撑在左侧壁板和右侧壁板上；上横梁位于顶部斜盖板之上，并且两端与竖梁连接，构成一个连续的横向加强梁组件；前起落架转轴轴承安装座布置于两个竖梁之间，在右侧壁板外侧，对应在前起落架转轴轴承安装座的位置，布置有纵梁，纵梁连接在竖梁上，解决了水上飞机前起落架舱门收放闭锁机构体积大的安装问题，V型船底安装空间小的问题，还能避免带水起飞对重心带来的不利影响。