FIELD: chemical industry. SUBSTANCE: described is method of preparing alpha-methoxyiminocarboxylic acid methylamides of formula I: α- wherein y is C-organic radical. Method is carried out by Pinner reaction of acylcyanide of formula II: α- with alcohol followed by reaction of ester formed in Pinner reaction: of formula IV: 
with (a) hydroxylamine to obtain oxime of formula V: 
by methylation of oxime of formula VI: 
or (b) with co- methylhydroxylamine to obtain oxime ester of formula VI: 
followed by reaction of oxime of formula VI with methylamine, Pinner reaction uses alcohol of formula III: wherein R is OH and boiling temperature of said alcohol is higher than 75 C. EFFECT: simplified process and high yield of the desired product. 11 cl, 14 ex, 22 tbl
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