Abstract: An assembly robot toy includes a gear box, a head part and an assembly component. The head part and the assembly component are detachably arranged on the gear box, the gear box internally is provided with a gear set, and a motor and a plurality of transmission rods which are respectively connected with the gear set. The assembly component is connected with the gear set and/or the transmission rod, and the bottom of the gear box is provided with a second avoidance hole corresponding to the position of the gear group for the assembly connection. The head part is provided with a power supply module which is electrically connected with the motor and used for supplying power to the motor; and the transmission rod is configured to rotate by transmission of the gear set when the motor is driven.