An anti-deformation low profile card edge connector includes an insulation body having a transverse elongated shape and a plurality of terminals. The insulation body has a top portion and a bottom portion forming along a transverse direction of the insulation body. An insertion slot is indentedly formed between the top portion and the bottom portion. The bottom portion is connected to a terminal base protruding further out than the top portion. Each terminal is respectively arranged on the terminal base to insert into the insertion slot. The insulation body and the terminal base are connected in such a manner that a space is reserved between them, and thereby the even contact between each terminal and the circuit board is not affected by deformation during a process of welding the card edge connector and a circuit board together.