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In this paper, we investigate multi-soft behaviors of tree amplitudes innonlinear sigma model (NLSM). The leading behaviors of amplitudes with oddnumber of all-adjacent soft pions are zero. We further propose and prove thatleading soft factors of amplitudes with even number all-adjacent soft pions canbe expressed in terms of products of the leading order Berends-Gielesub-currents in Cayley parametrization. Each sub-current in the expressioncontains at most one hard pion. Discussions are generalized to amplitudescontaining arbitrary number of nonadjacent soft blocks: The leading behaviorsof amplitudes where at least one soft block has odd number of adjacent softpions are zero; The leading soft factors for amplitudes where all soft blockscontaining even number of soft pions are given by products of soft factors forthese blocks.

Leading order multi-soft behaviors of tree amplitudes in NLSM