Sport training machine

The present invention discloses a sport training machine, which comprises a main frame, a back frame, a plurality of sensors and a power device. The main frame has a seat pad and a supporter, wherein the back frame, has a back pad, attaches to the main frame and the back frame further strengths an extension part. In addition, one end of the power device connects to the extension part, and the other end of the power device connects to the supporter respectively. Furthermore, there exists a plurality of sensors and temperature-controller on the seat pad and the back pad. As a result, while all sensors sense certain pressures and temperature values, each sensor transfers a signal to a processor correspondingly, and the processor drives the power device to rotate the extension part by means of the processor. Therefore, the back frame rotates respectively to match the requirement of each user.