The invention discloses a method for preparing dimethyl vinyl chlorosilane. The method comprises the following steps of: (1) mixing dimethyl hydrogen chlorosilane, a chloroplatinic complex catalyst and a solvent so as to obtain mixed liquid; and (2) introducing acetylene into the mixed liquid in a bubbling manner so as to carry out hydrosilylation reaction, and after the completion of the reaction, carrying out separation and purification to obtain the dimethyl vinyl chlorosilane. Compared with the prior art, the method disclosed by the invention has the advantages that raw materials are readily available, reaction conditions are mild, products are easily purified, both the yield and the purity of the products are high, and the operation is simple, the industrialization is easy to realize.