Suspended ceiling with splicing installation assembly

The suspended ceiling comprises a wall body and a suspended ceiling plate, the wall body comprises a top wall, a left wall, a right wall, a front wall and a rear wall, a sound insulation layer and a heat insulation layer are installed on the surface of the top wall, and fixing assemblies are arranged at the connecting position of the left wall and the right wall, the connecting position of the right wall and the front wall, the connecting position of the front wall and the rear wall and the connecting position of the left wall and the rear wall. Connecting assemblies are arranged at the connecting positions of the left wall, the right wall, the front wall, the rear wall, the first top plate and the second top plate, through cooperation of protruding blocks on the left wall, the right wall, the front wall and the rear wall and concave holes in the first top plate and the second top plate, the connecting stability is guaranteed, further fixing is conducted through cooperation of four sets of upper fixing plates