The invention belongs to the technical field of a decelerator of a conveying device for a coal-mining heading machine, and chain overload protection equipment. An automatic restoration adjustable torque limiter is provided to solve technical problems of serve torque limiter heating, poor reliability, inconvenient maintenance and incapability of restoration. The automatic restoration adjustable torque limiter comprises a left coupling, a rubber elastic body, a sleeve cylinder, a spring assembly and a right coupling, wherein one end of the left coupling is connected with one end of the sleeve cylinder via the rubber elastic body; one end of the right coupling is connected with the other end of the sleeve cylinder via a spring assembly; the spring assembly is formed by a spring, an internal rolling ball seat, a rolling ball and an external rolling ball seat; the external rolling ball is fixed in the sleeve cylinder via a thread; the spring and the internal rolling ball are placed in the right coupling; the rolling ball is arranged between the external rolling ball seat and the internal rolling ball seat; a guide arc-shaped groove and a round slot are formed in the internal circle of the sleeve cylinder; and the rolling ball can move between the guiding arc-shaped groove and the round slot. The automatic restoration adjustable torque limiter is simply structured with small size, proper heating, high reliability, easy maintenance and automatic restoration.