Improved top framework of top assembly of simple composite square cabin

The utility model discloses an improved simple composite shelter top assembly top framework which comprises an outer framework body and further comprises guide rail beams (1) which are oppositely arranged between the outer framework body. The skylight assembly (2) is installed between the two guide rail beams (1) in a back-and-forth sliding mode; the first top plates (3), the supporting beams (4) and the second top plates (5) are detachably installed on the two sides of the skylight assembly (2) from inside to outside in sequence. Large-area effective exposure during manual opening can be achieved, lighting and ventilation in the cabin are fully guaranteed, operation and use are convenient, the design structure is simple and reasonable, other kinetic energy resources do not need to be additionally consumed, physical environment friendliness is achieved, multiple water guide and drainage of a structure closed loop in a closed state are effectively achieved, and safety is high. 本实用新型公开一种改进的简易复合方舱顶部总成顶架构，包括外框架本体