The present invention discloses a real-time measurement probe and device for collapse liquid level in a core high-temperature and high-pressure environment. A single
liquid level measurement probe is assembled and arranged inside a channel to be measured and does not contact the inner wall of the channel. The
liquid level measurement probe includes a bottom support frame, a semi-
cylindrical electrode shell, a short cylinder, a
straight electrode wire, an inner-cylinder support frame, and a top support frame. The bottom support frame, the semi-
cylindrical electrode shell, the short cylinder, the
straight electrode wire, the inner-cylinder support frame, and the top support frame are coaxially connected in sequence from bottom to top; the
straight electrode wire is located inside the semi-
cylindrical electrode shell, and is kept in parallel and non-contact with each other by the bottom support frame, the inner-cylinder support frame, and the top support frame. The semi-cylindrical
electrode shell and the straight
electrode wire are spaced equally to form a probe body; the straight
electrode wire serves as one pole, and the semi-cylindrical electrode shell serves as the other pole, which are led out by wires and connected to a circuit respectively, to form two poles for
probe signal transmission, thereby realizing
signal transmission and reception.