Rock core imbibition measuring device and method for measuring rock core imbibition amount

The invention belongs to the technical field of petroleum engineering and processes, and particularly discloses a rock core imbibition measuring device. The device comprises a control unit, and the control unit comprises an electronic balance, an electromagnet and a controller. The imbibition unit comprises a first container, a permanent magnet and a hanging basket for placing a sample; the first injection unit is connected with the first container and is used for injecting fluid; and the second injection unit is connected with the first container and is used for injecting gas. Wherein the controller is configured to be capable of adjusting a magnetic field generated by the electromagnet, so that the magnetic field and the permanent magnet form magnetic coupling to promote the hanging basket to suspend in the first container; and the electronic balance is configured to measure the mass of the sample in the hanging basket in real time when the first injection unit and the second injection unit act together. In