The invention belongs to the field of medical appliances, and discloses a syringe pump for nerve block anesthesia and having a suction function in order to solve the technical problem that the conventional nerve block operations are completed by many workers. The syringe pump includes an infusion pump body; the infusion pump body includes a microcomputer system, a pump device, a detection device,an alarm device, and a display device; the pump device is used for providing power for infusion and pumping-back; the microcomputer system is used for controlling a working state of the pump device; the detection device is used for detecting the flow speed and the flow amount of liquid, the blocking pressure, leakage and bubbles and feeding the signals back to the microcomputer system; the alarm device is used for sending an alarm according to a command of the microcomputer; a dual-pedal type control device includes a pumping-back pedal and an infusion pedal; the pumping-back pedal is connected to a first signal input device for sending a pumping-back signal to the microcomputer system; and the infusion pedal is connected to a second signal input device for sending an infusion signal to the microcomputer system.