In order to improve the corrosion problem caused by acidizing fracturing，Schiff base acidizing corrosion inhibitor 1-phenyl-3-（1-cyclohexylamine）-propylene（PCP）was synthesized by cinnamaldehyde and cyclohexylamine. Its structure was characterized by infrared spectroscopy and gas chromatography-mass spectrometry. The corrosion inhibition effect of PCP was evaluated by weight loss method，electrochemistry（polarization curve，impedance spectrum，noise）and molecular dynamics simulation. The results showed that the synthesized product was the target product PCP. Under the condition of 15% HCl and 90 ℃， and with the increase of PCP concentration，the weight loss corrosion rate and corrosion current density of J55 steel decreased significantly，while the corrosion inhibition efficiency increased gradually. The corrosion inhibition efficiency could reach more than 99% under different PCP dosage，indicating good corrosion inhibition effect. When the dosage of PCP reached 0.15%，the overall corrosion rate and corrosion inhibition efficiency had little change with increasing concentration of corrosion inhibitor. That is，the adsorption concentration of corrosion inhibitor on the surface of J55 steel had reached the critical micelle concentration，so the adsorption amount did not change. PCP was a mixed corrosion inhibitor，which inhibited both cathode hydrogen evolution and anode dissolution reaction. With the increase of PCP concentration，the arc radius，polarization resistance and noise resistance were all arranged from small to large in following order：blank＜0.05%＜0.10%＜0.15%＜0.20%. The low frequency white noise level decreased with the increase of PCP concentration in the current PSD diagram. That is，the corrosion rate of J55 steel decreased continuously，which was consistent with the rule of weight loss method and polarization curve reaction. When PCP molecule adsorbed and balanced with the metal，the whole corrosion inhibitor molecule was in the same plane，and then adsorbed on the J55 steel surface in parallel to achieve complete coverage，thus effectively slowing down the immersion of corrosive medium.