The invention belongs to the technical field of explosion prevention, and particularly relates to a landmine-proof secondary effect floor which comprises a floor body, a vehicle body side surface attached seat and a floor mounting bolt, the floor body is mounted on the vehicle body side surface auxiliary seat through a floor mounting bolt; and the vehicle body side surface attached seat is arranged on the vehicle body. The floor body is a honeycomb floor. And the upper surface of the honeycomb floor is coated with a Kevlar protective layer. According to the scheme, the aluminum floor is replaced with the honeycomb floor with good rigidity and strength and is fixed to the auxiliary base on the side face of the vehicle body, a floor beam and a supporting stand column are omitted, the lower surface of the floor is coated with the Kevlar protection material layer, and finally the situation that people in the vehicle are injured secondarily can be prevented.