The utility model discloses a metering device for titanium tetrachloride charging. The metering device for titanium tetrachloride charging comprises a metering pump, a piston, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, and a controller, wherein the metering pump is internally provided with a piston chamber and is provided with a left opening and a right opening, and the left opening and the right opening are communicated with the piston chamber; the piston is arranged in the piston chamber in a horizontally-moving manner; an outlet of the first electromagnetic valve is communicated with the left opening, and an inlet of the second electromagnetic valve is communicated with the right opening; an outlet of the third electromagnetic valve is communicated with the right opening, and the fourth electromagnetic valve is communicated with the left opening; the controller is connected with the piston so as to record the motion times of the piston conveniently, and the controller is respectively connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve so as to conveniently control the opening and the closing of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve. The metering device for titanium tetrachloride charging can precisely control the flow rate of the titanium tetrachloride.