The invention provides a microwave therapeutic apparatus with ultrasonic imaging capability including a microwave radiation probe, a microwave generating unit, a laser generating unit, a color Doppler ultrasound imaging unit, and a microcomputer control unit. The microcomputer control unit outputs a microwave power control signal to control and adjust the power of the microwave generating unit, and outputs a laser control signal to control the switch-on and switch-off of the laser generating unit. Using the therapeutic apparatus to treat the lower extremity varicose vein disease are advantageous. The closure of the varicose vessel is accurate, firm, and thorough. The traumas for patients are small. The pain of patients is alleviated. The intraoperative bleeding is reduced. The recovery of patients is rapid. It is difficult to form deep vein thrombosis, the diseased blood vessel can be accurately treated and the effect of the surgery can be simultaneously and instantly verified.