The application discloses a baking oven for flexible circuit board production and relates to the technical field of flexible circuit board production.The baking oven comprises a box body, a frame is arranged in the box body in a sliding mode, the frame is arranged in a penetrating mode, a plurality of slots are symmetrically arranged on the frame, guide columns are arranged on the frame in an elastic sliding mode at the slots, sliding clamping blocks matched with the guide columns are arranged in the slots in a vertical sliding mode, and fixed clamping blocks are arranged on the top of the sliding clamping blocks.The guide columns are extruded with the inserting rods at the bottom of the sliding clamping blocks, the inserting rods drive the sliding clamping blocks at the top to move upwards, the sliding clamping blocks cooperate with the fixed clamping blocks to limit and clamp the long-strip-shaped flexible circuit board, and the staff only needs to slide the frame out of the box body, the guide columns are reset and slide, the inserting rods drive the sliding clamping blocks to reset in the process, and the long-strip-shaped flexible circuit board is released from the limitation.