The invention relates to an ionic liquid compound, a preparation method thereof, an ionic liquid polymer, use of the ionic liquid polymer and polymer solid electrolyte containing the ionic liquid polymer and particularly provides an ionic liquid compound with the structure presented by a formula (1) (shown in the description), a preparation method of the ionic liquid compound, an ionic liquid polymer with the structure represented by a formula (25) (shown in the description) and a preparation method of the ionic liquid polymer. Anion centers of the ionic liquid compound and the ionic liquid polymer are perfluorsulfimide ions with relatively weak coordination capacity, so that the binding capacity of the anion centers to Li<+> is reduced, and the specific conductance and Li<+> transferencenumber of the polymer solid electrolyte containing the containing ionic liquid polymer are increased; and the ionic liquid polymer is compounded with lithium salt so as to form the polymer solid electrolyte containing an ionic liquid-polyion liquid compound, and the ionic liquid-polyion liquid compound has a micro-liquid phase structure, so that the specific conductance and Li<+> transference number of the electrolyte can be further increased.