A molecularly imprinted electrochemical sensor for the detection of salicylic acid(SA) was prepared based on graphene modified glassy carbon electrode，with SA as the template molecule and o phenylenediamine(o PPD) and pyrrole(Py) as the functional monomers.The surface morphology of imprinted membrane was observed by scanning electron microscopy(SEM)，and the performance of molecular imprinted sensor was investigated based on square wave voltammetry(SWV) and cyclic voltammetry(CV).Results showed that，under the optimal conditions，there was an excellent linear relationship for the electrochemical sensor between peak current and negative logarithm of SA concentration in the range of 1.0×10-8-1.0×10-2 mol/L，with a detection limit of 8.6×10-9 mol/L.The sensor exhibited a good selectivity toward SA，and the recoveries ranged from 101% to 106% with a relative standard deviation(RSD) of 3.8%.With the advantages of simple preparation，good anti interference ability，high sensitivity and low cost，the molecularly imprinted sensor showed a potentiality in practice application.