As injection molding machine technology and the rapid development of science and technology, the plastic molding factory automation demand is higher and higher, so the injection robot arms quickly gained popularity, it is mainly used for injection molded parts by injection molding machine, workers use this device can reduce workload, improve labor productivity and automation level in the molding workshop. Plastic injection molding speed and efficiency is equivalent to save cost, so the robot will play an important role in improving manufacturing process. From simple port choice to complex automation machinery swing robot arm, the plastic molding industry is using this automation trend. Through the continuous development of injection molding manipulator, robotic arms can lead to the development of automated plant auxiliary equipment such as conveyor belt, thus to form a larger industrial chain and promote the development of the injection molding industry.