The invention discloses a film coating platform for battery boxes. The film coating platform comprises a horizontal platform plate, wherein the battery boxes are captured by a battery box transfer mechanism and are placed on the platform plate; limiting raised lines are arranged on the left side and the right side of the platform plate side by side; a clamping cylinder and a clamping block are arranged on the right side of the platform plate; a notch for the clamping block to pass through is formed in the limiting raised line on the right side of the platform plate; and the clamping block is driven by the clamping cylinder to move towards the left side and is used for abutting the battery boxes. The film coating platform of a film coating machine for the battery boxes disclosed by the invention is simple in structure and reliable in operation, the cost is also relatively low, and the film coating platform is beneficial for popularization in the storage battery industry.