The invention discloses a mould for a sequential driving mechanism with a small slide block walking in a large slide block. The mould comprises a female template, a male template, a male die bearing plate, square iron, an upper top plate and a lower top plate, which are connected in sequence from top to bottom; one side of the male template is provided with a slide block; the lower part of the slide block is provided with a slide block seat; a beam block arranged on the male die bearing plate is contacted with the slide block seat and extends into the slide block; the mould is characterized in that the slide block is divided into the large slide block and the small slide block, wherein the small slide block is positioned on the upper part of the slide block seat and in the large slide block; moreover, the male die bearing plate is also provided with a shell-drawing positioning device. The mould has the advantages of simple and convenient machining, simple structure, easy installation and convenient moulding, greatly improves the appearance of a product, and ensures the product quality.