The invention discloses a double-insertion type antitheft door and relates to the field of antitheft safety doors. The double-insertion type antitheft door is mainly characterized in that an insertion lug is arranged at the position, corresponding to each doorframe insertion hole, of a doorframe buckled edge, an insertion lug gap is formed between each insertion lug and a doorframe, a double-insertion plate is arranged at the position, closely neighboring a door leaf side edge, inside the door leaf, the double-insertion plate is provided with liner plates in the mode that each liner plate corresponds to the corresponding insertion hole in the doorframe, a narrow-slit type insertion hole is formed between each liner plate and the double-insertion plate, the side edge of a panel inside the door leaf is provided with rectangular insertion holes in the mode that each rectangular insertion hole corresponds to the corresponding narrow-slit type insertion hole, the insertion lugs, the door leaf side edge, the double-insertion plate and the liner plates are each provided with an insertion hole in the mode of corresponding to the doorframe insertion holes, the five insertion holes which are correspondingly formed constitute a group, after the door leaf is closed, the insertion lugs are inserted into the rectangular insertion holes and the narrow-slit type insertion holes, the double-insertion plate is also inserted into the insertion lug gaps, the five insertion holes are all coaxial, lock tongues are inserted into the five concentric insertion holes correspondingly and used for locking the antitheft door, and the double-insertion type antitheft door is resistant to unclenching and damage.