Synthesis method of plant root puncture resistant waterproof material auxiliary agent PBE

The invention relates to an organic synthesis technology, in particular to a synthesis method of a plant root puncture resistant waterproof material additive PBE. The synthesis method provided by the invention comprises the following steps: synthesizing a catalytic system containing a catalyst P by adopting paratoluensulfonyl chloride and 4-dimethylaminopyridine; hydroxyl of halogenated silane M and L-lactate is subjected to active conversion in a catalytic system containing a catalyst P, and high-activity silyl ether ester SIA is obtained; carrying out ether conversion on the high-activity silyl ether ester SIA and p-chloro-o-cresol in the presence of a polar solvent and a catalyst W to obtain phenolic ether B; and carrying out ester exchange on the phenolic ether B and the long-chain alcohol under the action of the catalyst T to obtain a target product. The synthetic method disclosed by the invention has the advantages of simple process steps, no high-pressure and high-temperature reaction, easily available