Multi-channel quantitative pipettor

The utility model discloses a multi-channel quantitative pipettor. The device comprises a push-pull plate and a base, wherein a transfer pipette is mounted on the base; the pipettes are arranged at equal intervals in the length direction of the base. A suction nozzle is mounted at the bottom of the transfer pipette; a connecting column is mounted on the push-pull plate; the connecting column is fixedly connected with the push-pull plate; the connecting columns and the pipettes are equal in number and are in one-to-one correspondence; a sealing plate is mounted on the connecting column; clamping grooves are formed in the two ends of the push-pull plate, fixing side plates are installed at the two ends of the base, hinge grooves are formed in the fixing side plates, clamping plates are installed in the hinge grooves, torsional springs are installed at the bottoms of the clamping plates, and the bottoms of the clamping plates are installed in the hinge grooves through the torsional springs. According to the util