Material belt automatic deploying and retracting device

The utility model discloses a material belt automatic deploying and retracting device. The material belt automatic deploying and retracting device comprises a frame, and an automatic feeding mechanism, a material belt feeding mechanism and an automatic material receiving mechanism which are fixedly arranged on the frame in sequence, wherein the material belt feeding mechanism comprises a first driving shaft which is arranged at one end, close to the automatic material receiving mechanism, of the frame and is used for driving a material belt to feed in a first movement direction, a second driving shaft which is arranged at one end, close to the automatic material receiving mechanism, of the frame and is used for driving the material belt to feed in a second movement direction vertical to the first movement direction, a first cylinder and a second cylinder which are arranged on the left side and the right side of the first driving shaft respectively and are used for clamping the material belt during feeding of the material belt, and an encoder which is arranged at one end, close to the automatic material receiving mechanism, of the frame and is used for monitoring the feeding accuracy of the material belt in the first movement direction in real time. By adopting the material belt automatic deploying and retracting device, the material belt can be fed accurately, the influences on the feeding accuracy and use quality of the material belt caused by deformation of the material belt are avoided, and meanwhile an automatic alarm can be made after the material belt is used up.