The invention discloses a hard disk data interface pitch conversion connector, which includes a main body rubber core, a hard disk contact terminal, an FFC transfer terminal, a PCB board and a cover body. The PCB board is connected to the main body rubber core through a plurality of hard disk contact terminals. An FFC transfer terminal is also provided between the PCB board and the main body rubber core, and an FFC is connected to the FFC transfer terminal; a cover is provided on the outside of the PCB board, and the cover is connected to the main body rubber core; The FFC transfer terminal includes a first socket, a second socket, a first connecting body and a second connecting body, the first connecting body is connected to the PCB board, the second connecting body is connected to the main rubber core, and the The first socket and the second socket are distributed on both sides of the PCB, and the first FFC and the second FFC are respectively connected to the first socket and the second socket. In the present invention, an FFC transfer terminal is arranged between the PCB board and the main rubber core, so that the FFC can be directly inserted into the socket of the FFC transfer terminal, which is very convenient to plug and unplug, and replaces the original welding method.