The invention discloses a tool plate access device for press-fitting a PCB (Printed Circuit Board). The device comprises a storage part with a multi-layer structure, and tool plates are stored in access positions in the storage part by layers, wherein the storage part comprises a first storage part and a second storage part which are arranged in parallel, and an access device is arranged between the first storage part and the second storage part; a vertical lifting mechanism is connected above the access device, and a first horizontal conveying device butt jointed with a production line is arranged below the first storage part; the access device conveys a tool plate in any storage position to the first horizontal conveying device or places the tool plate on a mobile conveying trolley below the second storage part under the drive of the vertical lifting mechanism; and the tool plate is conveyed by the first horizontal conveying device or the mobile conveying trolley by butt jointing with the production line. The device can realize the two-way access of the tool plates on the first storage part and the second storage part, can directly butt joint with the production line for conveying, has an on-line conveying function, does not separately occupy a space and improves the production efficiency.