Efficient shield split starting construction method

An efficient shield split starting tunneling construction method comprises the steps that S1, primary main machine tunneling is conducted; s2, the main machine, the equipment bridge, the 1 # trolley and the 2 # trolley are tunneled for the second time; and S3, third-time complete machine starting tunneling is carried out. According to the method, the method that shield body assembling, staged tunneling and negative ring duct piece dismantling in advance are carried out in a shaft starting well, and then a counter-force frame is moved forwards is adopted, shield split starting construction is decomposed into the three-time tunneling process, and three-time split starting can enable shield construction to be even under the condition of the single shaft narrow space; after a certain distance is excavated in the split starting process of the main machine for the first time, a negative ring pipe piece is dismantled in advance, a reaction frame is moved forwards to the opening end, the single vertical shaft can pro