In order to prepare a green and efficient compound gas phase corrosion inhibitor for metal anti-rust packaging. Sodium benzoate (C7H5CO2Na), sodium gluconate (C6H11O7Na), phytic acid (C6H18O24P6) and sodium citrate (C6H5Na3O7) were selected as compound drugs, and A3 steel and 45# steel were used as the experimental objects. The compound gas phase corrosion inhibitor formula with the highest corrosion inhibition rate was selected through the volatilization weight-loss test in closed space, the rapid gas phase discrimination experiment, the electrochemical experiment and the damp heat experiment. The vapor phase corrosion inhibitor with the highest corrosion inhibition rate was made into vapor phase rust prevention paper, and the rust prevention effect was compared with anti-rust base paper and commercial vapor phase anti-rust paper. The control experiment used scanning electron microscope (SEM) and energy spectrometer (EDS) and contact angle meter test. The quaternary compound group 11 g/L sodium benzoate+11 g/L sodium gluconate+15 g/L phytic acid+5 g/L sodium citrate had the highest corrosion inhibition rate, and the corrosion inhibition rate for A3 steel reached 94.36%. The corrosion inhibition rate of 45# steel reached 94.47%. The A3 steel and 45#steel protected by the anti-rust paper had a smooth surface, no corrosion, low oxygen content, and a contact angle greater than 90°, showing obvious hydrophobicity. After the screening, the gas phase corrosion inhibitor with the highest corrosion rate was finally determined as 11 g/L sodium benzoate+11 g/L sodium gluconate+15 g/L phytic acid+5 g/L sodium citrate, and the anti-rust effect of the prepared composite VCI paper is better than the anti-rust base paper of the blank control group and the commercial VCI paper.