The invention discloses a parallel material liquid inputtingdevice, which is used for inputting material liquid into each reactor of parallel reactors. The parallel material liquid inputting device comprises a tank body, a stirring mechanism, a tank cover, a material discharging pipe and a liquid outlet pump, wherein the tank body is used for containing the material liquid; the stirring mechanismacts on the material liquid in the tank body so that the material liquid is uniformly mixed; the tank cover can be covered on the tank cover for sealing the tank cover; one end of the liquid outlet pipe extends to the bottom of the tank body; the other end of the liquid outlet pipe is divided into a plurality of liquid outlet pipe branches; each liquid outlet branch can be connected into one of the reactor; the liquid outlet pump is arranged on the liquid outlet pipe branch so that the material liquid enters the reactor through the material discharging pipe; the material liquid input into eachreactor of the parallel reactor is all from the same tank body; the material liquid of the tank body is uniformly mixed through being stirred by the stirring mechanism; a plurality of branch pipes extending out from the liquid discharging pipe are respectively provided with the liquid outlet pump so as to suck out the material liquid; the material liquid flowing flow rate can be regulated. Therefore the consistency of the quantity and the quality of the initial material liquid in reach reactor can be realized; the reliability of the final study result is improved.