An ultrasonic puncture method including the following steps: mounting a probe beam direction indicator on a probe by an indicator holder, with the orientation of the probe beam direction indicator the same as that of the probe, and enabling a light beam emitted by the probe beam direction indicator to rotate in a plane perpendicular to a beam plane of the probe; rotating the probe beam direction indicator to allow the light beam to coincide with the beam plane of the probe, and locking the probe beam direction indicator; and placing the probe on the body surface, and inserting a puncture needle along the light beam after a focus is found. The method can solve the problem of having difficulty in accurately and rapidly displaying the puncture needle on an ultrasonogram in free-hand puncture of a superficial tissue or superficial organ at present. An ultrasonic puncture device is also disclosed.