A liquid crystal phase shifter, comprising: a microwave transmission structure and a phase adjustment structure opposite to each other, and a liquid crystal layer between the microwave transmission structure and the phase adjustment structure; wherein the phase adjustment structure comprises a plurality of phase adjustment units; the plurality of phase adjustment units are configured to change a dielectric constant of the liquid crystal layer according to a voltage applied to the phase adjustment units and a voltage applied to the microwave transmission structure, so as to adjust a phase of a microwave signal; wherein the microwave transmission structure comprises: a first substrate; a microstrip at a side of the first substrate proximal to the liquid crystal layer; and a ground electrode at a side of the first substrate distal to the liquid crystal layer; wherein the plurality of phase adjustment units are configured to change the dielectric constant of the liquid crystal layer according to the voltage applied to the phase adjustment units and a voltage applied to the microstrip, so as to adjust the phase of the microwave signal; wherein the phase adjustment structure comprises a second substrate; wherein the plurality of phase adjustment units are at a side of the second substrate proximal to the liquid crystal layer; and each of the plurality of phase adjustment units comprises a plurality of electrode strips which are at the side of the second substrate proximal to the liquid crystal layer and have an interval between any adjacent two of the plurality of electrode strips, an orthographic projection of each of the plurality of electrode strips on the first substrate at least partially overlaps an orthographic projection of the microstrip on the first substrate, and numbers of the electrode strips of the plurality of phase adjustment units are different from each other; wherein the liquid crystal phase shifter further comprises a plurality of offset lines that have a one-to-one correspondence with the plurality of phase adjustment units and are in a peripheral portion of the side of the second substrate proximal to the liquid crystal layer, and each of the plurality of offset lines is connected to the electrode strips of a corresponding phase adjustment unit; all of the electrode strips of each phase adjustment unit is controlled by using a same offset line; and all of the electrode strips of each phase adjustment unit is provided with a same voltage by the same offset line. a microwave transmission structure and a phase adjustment structure opposite to each other, and a liquid crystal layer between the microwave transmission structure and the phase adjustment structure; wherein the phase adjustment structure comprises a plurality of phase adjustment units; the plurality of phase adjustment units are configured to change a dielectric constant of the liquid crystal layer according to a voltage applied to the phase adjustment units and a voltage applied to the microwave transmission structure, so as to adjust a phase of a microwave signal; wherein the microwave transmission structure comprises: a first substrate; a microstrip at a side of the first substrate proximal to the liquid crystal layer; and a ground electrode at a side of the first substrate distal to the liquid crystal layer; wherein the plurality of phase adjustment units are configured to change the dielectric constant of the liquid crystal layer according to the voltage applied to the phase adjustment units and a voltage applied to the microstrip, so as to adjust the phase of the microwave signal; wherein the phase adjustment structure comprises a second substrate; wherein the plurality of phase adjustment units are at a side of the second substrate proximal to the liquid crystal layer; and each of the plurality of phase adjustment units comprises a plurality of electrode strips which are at the side of the second substrate proximal to the liquid crystal layer and have an interval between any adjacent two of the plurality of electrode strips, an orthographic projection of each of the plurality of electrode strips on the first substrate at least partially overlaps an orthographic projection of the microstrip on the first substrate, and numbers of the electrode strips of the plurality of phase adjustment units are different from each other; wherein the liquid crystal phase shifter further comprises a plurality of offset lines that have a one-to-one correspondence with the plurality of phase adjustment units and are in a peripheral portion of the side of the second substrate proximal to the liquid crystal layer, and each of the plurality of offset lines is connected to the electrode strips of a corresponding phase adjustment unit; all of the electrode strips of each phase adjustment unit is controlled by using a same offset line; and all of the electrode strips of each phase adjustment unit is provided with a same voltage by the same offset line.