The invention belongs to the technical field of medical instruments and discloses a medical interventional therapy device for medical oncology, and a control method thereof. The device comprises a linear motor. The rotating ring of an output shaft of the linear motor is connected with a sliding connecting rod through a screw structure. The sliding connecting rod is connected with a one-way syringethrough a joint; the lateral side of the unidirectional syringe is clamped with a transverse fixing support; vertical fixing supports are fixed at both ends of the transverse fixing supports; the other end of the unidirectional syringe is connected with a syringe tube through a three-way one-way valve; the other side of the three-way one-way valve is connected with a burette through the one-way valve; the other end of the burette is connected with a medicine storage bottle through a medicine adding valve; a linear motor is wirelessly connecte with a signal acquisition control module; and thesignal acquisition control module is connected with a display module and a control module. The invention realizes the treatment of radiation and injection medicine, saves the treatment time, reduces the pain of the patient, improves the treatment effect and saves the treatment cost.