4A Zeolite has strong calcium and magnesium ion exchange capacity, it can play a role in softened water, decontamination and the environment pollution-free, is an environmentally friendly product, is the production of non-phosphorus washing powder, the most ideal detergent additive to substitute for sodium tripolyphosphate (STPP). To achieve development of Xinjiang bentonite resources and reduce costs of zeolite 4A, In this paper, the Bentonite-rich resources in Xinjiang was taken as the raw materials, to synthesize detergent additive of 4A zeolite. In this paper, firstly, Bentonite was carried out wet purification, and then the good bentonite was carried out chemical analysis, in addition to containing the ingredients needed for synthesis of 4A zeolite SiO2 and Al2O3, also contains a number of other impurities, such as Fe2O3, CaO, MgO, etc.. The use of sulfuric acid to remove iron, magnesium impurity ions, at the same time part of Al2O3 dissolution and destruction of the multilayer crystal structure of Bentonite, improve the activity of SiO2 content. Analysis of its composition, silicon content of acidification clay is greater than the silicon content of 4A zeolite, Partial sodium aluminate and sodium hydroxide supply aluminium source and sodium source. SiO2 Content of acidification clay is the total amount of active SiO2 and quartz impurities, this time through the sodium hydroxide treatmen remove quartz impurities. The zeolite 4A.is obtained after gelation, crystallization, filtration and dryness. Bentonite as raw material in the synthesis of zeolite 4A, the paper by adding crystallization directing agent, to shorten the crystallization time and reduce product size, and calcium ion exchange capacity of the product has increased. To acidification clay as raw material, this paper carried out rapid low-Tem- perature synthesis of Zeolite 4A from Bentonite by ultrasonic method, has been the performance of the 4A zeolite products better. The synthesis of zeolite 4A on an analysis of test，its performance in line with the use of 4A Zeolite detergent QB/T1768-2003 standards.