Abstract: In order to explore whether extraction interference will affect the concept priming effect in semantic classification tasks, and whether the influence is due to the competition of action response resources, the experiment is divided into three conditions:no interference, simultaneous interference and sequential interference. Under the sequential interference, there are two conditions:reactive competition and non reactive competition. The experimental results show that extraction interference will affect the concept priming effect, as long as If there is extraction interference, the priming effect will be destroyed, but only when the subsequent interference has reaction competition, the negative priming effect will exist. Therefore, the extraction interference effect comes from the dispersion of attention resources in the dual task operation, and the reaction competition will further destroy the priming effect.