A composite pallet includes two parallel bottom block components each including a first bottom block and a second bottom block slidably connected, the first bottom block is capable of sliding relative to the second bottom block to vary the length. The composite pallet further includes two cantilever components each including a first cantilever and a second cantilever slidably connected, the first cantilever and the second cantilever each are fixed to a corresponding one of the bottom block components, the first cantilever being capable of sliding relative to the second cantilever along a lengthwise direction of the cantilever components to vary the length of the cantilever components. A crossed beam component includes a first beam and a second beam pivotably connected at a middle portion, free ends of both the first beam and the second beam are pivotally connected to free ends of the bottom block components.