Abstract: The present invention discloses a new plastic floor, which comprises: a rectangular floor body; it is characterized by that: a first/second extension side is protruded at two adjacent sides of the floor body and connected to each other; a first/second mating portion is set vertically at outer ends of the first/second extension side; a first/second recessed side is connected at the other two adjacent sides of the floor body and coupled with the first/second extension side; a first/second mated portion is set within the first/second recessed side correspondingly to the first/second mating portion; two adjacent floor bodies are positioned by perpendicular mating of the first/second mating portion and the first/second mated portion.