The invention relates to a preparation method of environment-friendly oil filled solution polymerized styrene-butadiene rubber. The preparation method comprises the following steps: carrying out a copolymerization reaction on conjugated diene and monovinyl aromatic hydrocarbon by taking dissymmetrical ether as a structural adjustor and organolithium as an initiator; carrying out coupling and branching reactions; and then, filling environment-friendly rubber extending oil to obtain the product. The vinyl content of the obtained product is over 57%, and the product has high slip resistance and low rolling resistance, so that the product is particularly suitable for manufacturing tyre treads.