The present invention provides a vortioxetine pamoic acid salt, which includes a crystal form, a solvate or an amorphous substance of the vortioxetine pamoic acid salt. The present invention provides a preparation method and use of the vortioxetine pamoic acid salt and the crystal form thereof. The vortioxetine pamoic acid salt prepared in the present invention prolongs the residence time of the vortioxetine in vivo, achieving a slow release of the vortioxetine in vivo, and is suitable for preparing a long-acting dosage form.