Soil remediation agent filling device capable of preventing agent residues

The utility model relates to the technical field of soil remediation, and provides a soil remediation agent filling device capable of preventing agent residue, which comprises a base, a support frame and a mixing box are respectively and fixedly arranged at the top of the base from left to right, and an anti-residue assembly is arranged in the mixing box; a storage assembly and a circular cylinder are arranged at the top of the mixing box, one end of the storage assembly is connected with the circular cylinder, a piston is slidably clamped in the circular cylinder, and a connecting rod and a spring are fixedly mounted on one side of the piston. A proper amount of water is added according to scale marks on the mixing box, a connecting rod is pulled according to scale marks on a circular barrel to drive a piston to move and extrude a spring, the repair liquid in the storage assembly enters the circular barrel, the connecting rod is loosened, the spring resets the piston, and the repair liquid in the circular ba