The invention provides a child automobile chassis, belongs to the technical field of child automobiles, and solves the technical problems of low strength, difficulty in processing and relatively great weight of the conventional child automobile chassis. According to the technical scheme of the invention, the child automobile chassis is used for fixing an automobile body bracket and a shell, and comprises a fixed main plate which is arranged horizontally in the axial direction, wherein the circumference of the fixed main plate extends downwards, and a first reinforcing ring is formed; mounting wing plates extend transversely outwards from both sides of the fixed main plate respectively; the automobile body bracket is fixedly connected with the upper surfaces of the mounting wing plates; the circumferences of the mounting wing plates extend downwards, and reinforced side plates are formed; the reinforced side plates are connected with the first reinforcing ring. The child automobile chassis has the beneficial effects of more reasonable structure and stress, light weight, higher strength, longer service life, simple structure and convenience in processing.