Trade barrier is adverse to export growth but can boost diversification development of the products and market for export trade and can urge the export enterprises to improve products competence by technical innovation. Both trade diversification and technical progress are conducive to export stability, as a result, the intensification of trade barrier has negative influence on export volatility. Based on the trade remedy data, and the data of 4-digit industries （ISIC） of countries（regions） that have trade relations with China from 1998 to 2018, by taking the remedy case quantity in trade with China as the agency variables of trade barrier, this paper empirically tests the impact of trade barriers on China's export volatility. The results show that the increase of the remedy cases in the trade with China has negative impact on China’s export volatility, and this impact is more significant for manufacturing and downstream industries. The increase of trade barrier can significantly reduce the export volatility of China to the countries and regions with higher diversification degree for importing China’s products but the impact is not significant to the countries and regions with lower diversification degree for importing China’s products. The increase of trade barrier can intensify export volatility when the diversification degree of export products market is low, however, the increase of trade barrier can weaken export volatility when market diversification degree is high. Comparing with the industries with low intensity of research and development, the increase of trade barrier has more weakening effect on the export volatility for the industries with high intensity of research and development. Facing all kinds of trade barriers, we should implement diversified high-quality development strategy, make efforts to improve export trade diversification level, use technical innovation to promote export products quality, and further enhance export stability and improve export competence.