Halogen-free flame-retardant PBT (polybutylene terephthalate) copolyester feeding vibrating screen

The utility model discloses a halogen-free flame-retardant PBT copolyester feeding vibrating screen which comprises two symmetrically-arranged bottom plates, the upper ends of the bottom plates are fixedly connected with two vertically-symmetrically-arranged bases, the upper ends of the bases are connected with telescopic columns in a sliding mode, the upper ends of the telescopic columns are fixedly connected with the same vibrating bin, and the lower ends of the telescopic columns are fixedly connected with the same vibrating bin. An obliquely-arranged sieve tray is rotationally connected into the vibration bin, and a rolling brush is arranged on the lower side of the sieve tray and movably connected with the vibration bin. One end of the sieve tray is lifted through the thread feeding effect generated between the screw rod and the supporting plate, the inclination angle of the sieve tray is changed, the feeding speed of materials rolling downwards along the sieve tray is changed, the function of adjusting