The present invention relates to an anti-skid speed measurement and material flow detection device for a belt conveyor, include a base symmetrically arranged on the intermediate frame of the belt conveyor and arranged between two groups of slotted roller supports, sliding supports arranged on the base, a speed measurement roller and a sensor arranged on the two groups of sliding supports, and a control system connected with the sensor, a speed measurement disk is sleeved on an end face of one end of a barrel of the speed measurement roller, a circular hole is formed on the circumference of the speed measurement disk, the circular hole is arranged corresponding to the position of the senso. Compared with the prior art, the present invention has the advantages of dramatically reduced production cost and maintenance cost, simple structure and high reliability.