The invention provides interface availability reporting and indicating methods and equipment. The reporting method comprises the steps that an access AS layer reports availability information of a target interface of first terminal equipment to an upper layer; the availability information comprises at least one of first information, second information, third information, fourth information and fifth information; and the first information comprises the availability of the target interface, the second information comprises link information suitable for the availability of the target interface, the third information comprises time information suitable for the availability of the target interface, the fourth information comprises sidelink resource selection mode information suitable for the availability of the target interface, and the fifth information comprises current sidelink resource selection mode information of the first terminal device. According to the method and the equipment, the availability information reported to the upper layer by the AS layer can be clear and definite, and the communication effectiveness is improved.