The invention relates to a waste treatment device, in particular to a building waste treatment device. A device support, a crushing support, a power mechanism, a quivering mechanism, a pushing mechanism and a crushing mechanism are included; the quivering mechanism and the pushing mechanism can be driven by the power mechanism to move at the same time; when the quivering mechanism moves, breakingtreatment is performed on building waste through relative movement between a quivering inclined plate I and a quivering inclined plate II; the building waste where breaking treatment is completed falls on a crushing box; the building waste is subjected to preliminary separation through screening holes and electromagnets arranged on the crushing box, and irony waste and non-irony waste in the building waste are separated; and the crushing mechanism is driven by the pushing mechanism to slide on the crushing box, the crushing mechanism rotates on its axis while sliding in a reciprocating manner,and the waste in the crushing box is further broken; and the building waste treatment device is applicable to the building waste with rebar mechanisms mostly in a cylindrical shape, and other building waste on rebar is further separated.