In order to eliminate the locating error for acoustic emission system due to the sonic speed measurement deviation, a new multi-probe locating method is proposed. The calculation formulas of linear locating and planar locating are deduced in theory. Experiments were carried out in steel pipe and on plane using AE21C 4-channel acoustic emission instrument with the signal of pencil lead fracture as simulating source. Experimental results prove that this new method has good locating precision. In order to loca...