Novel energy-saving single-screw extruder

The utility model provides a novel energy-saving single-screw extruder, and relates to the technical field of extruders. The novel energy-saving single-screw extruder comprises a bottom plate, a cylinder is arranged at the top of the bottom plate, a transmission shaft is arranged in the cylinder, a spiral plate is fixedly connected to the outer side of the transmission shaft, a feeding hopper is arranged at the top of the cylinder, and a protection assembly is arranged at the end, away from the hopper, of the cylinder; the protection assembly comprises a vertical rod, a pressing rod, a connecting rod, a spring, a sliding rod and a spring, and the vertical rod is fixedly connected to the outer side of the transmission shaft. According to the novel energy-saving single-screw extruder, the motor can be turned off to form protection by touching the contact switch at the bottom end in the sliding rod through the connecting rod, so that the motor can be prevented from exceeding the load, themotor in the device can