The invention discloses a preparation technology of methyl 
triethoxysilane. Methyldichlorosilane and absolute ethyl 
alcohol are adopted as the raw materials, and the technology comprises the four steps of alcoholysis, deacidification, separation of crude products and refinement, and comprises the following specific steps: carrying out alcoholysis reaction on methyldichlorosilane and absolute ethyl 
alcohol subjected to 
vaporization and steam stripping in an alcoholysis reaction 
tower; introducing the product mixture into a stripping 
tower for steam stripping of unreacted methyldichlorosilane and HCl, conveying the product mixture subjected to steam stripping into a 
neutralization kettle, and further removing HCl through the action of a neutralizer; after 
neutralization, filtering for salt removal to obtain a crude product of methyl 
triethoxysilane; carrying out rectification on the crude product for purification to obtain a colorless and transparent methyl 
triethoxysilane product. According to the preparation technology, the use of an 
organic solvent is avoided, the reaction is mild, the 
side reaction is less, and the product content is high; the recycling of the 
monomer by-product, namely, methyldichlorosilane, is effectively realized, and the additional value is increased; the devices used in the technology are conventional devices, the operation is easy to control, the 
pollutant emission during the whole reaction process is less, and the preparation technology is quite suitable for industrialized and enlarged production.