The invention provides a high-speed automatic forming machine for forming art straws. The high-speed automatic forming machine comprises a motor, a first synchronous wheel, a second synchronous wheel, a driving shaft and a power shaft. One end of the driving shaft is fixedly connected with the output end of the motor through a coupler. A driving shaft external thread is arranged on the outer wall of the other end of the driving shaft. A first synchronous wheel internal thread matched with the driving shaft external thread is arranged on the inner wall of the first synchronous wheel. The other end of the driving shaft is in threaded connection with the first synchronous wheel. One end of the power shaft is connected with an input shaft of a conveyor, and a power shaft external thread is arranged on the outer wall of the other end of the power shaft. A second synchronous wheel internal thread matched with the power shaft external thread is arranged on the inner wall of the second synchronous wheel, and the other end of the power shaft is in threaded connection with the second synchronous wheel. The first synchronous wheel is engaged with the second synchronous wheel. The number of teeth of the first synchronous wheel is 15, and the number of teeth of the second synchronous wheel is 80. The high-speed automatic forming machine has the advantages of being simple in structure and high in rotation speed.