The 2-thiophene ethylamine is obtained from 2-bromothiophene as starting material by the Grignard reaction, and then carrying out condensation reaction with N-tosyl aziridine to get N-tosyl-2-thiophene ethylamine, then carrying out deprotection to get 2-thiophene ethylamine, this method has the advantages of simple operation, low material cost and suitable for industrialized production