A sleeve of a distribution transformer comprises a sleeve body, wherein a pressing block is arranged on the sleeve body, and a rubber ring is arranged between the sleeve body and the pressing block. The sleeve of the distribution transformer is characterized in that the sleeve body is made of insulation silicon rubber, a magneto-electric inductor is arranged in the sleeve body in embedding mode, and a lead end of the magneto-electric inductor is guided out of the sleeve body. The sleeve of the distribution transformer has the advantages that the installation process is easier and more convenient due to the fact that no additional current inductors are needed to be installed, and simultaneously the problem of large measurement error rate caused by installation process level is solved due to the fact that the position of the magneto-electric inductor in the sleeve body is fixed. In addition, the sleeve body can protect the magneto-electric inductor so that failure rate of measurement devices is reduced and service life of the measurement devices is long. The sleeve body is good in insulation performance due to adoption of insulation silicon rubber, and simultaneously effect on the magneto-electric inductor caused by the insulation silicon rubber is weak due to the fact that the insulation silicon rubber is small in interior stress.