Assembly tool of engine oil seal

The invention discloses an assembly tool of an engine oil seal. The assembly tool comprises a pressing plate, oil seal pressing bolts, an oil seal pressing sleeve, an oil seal pressing screw rod and an oil seal guide pressing head, wherein a bolt hole is formed in the middle part of the pressing plate; first pressing bolt through holes are symmetrically formed in two sides of the bolt hole; two oil seal pressing bolts are arranged pairwise, and are respectively inserted in the first pressing bolt through holes; a projected bearing base is formed at one end of the oil seal pressing sleeve; a bearing is arranged in the bearing base through a bearing retainer ring; the oil seal pressing sleeve is movably inserted in the oil seal pressing bolts; an oil seal pressing step is radially projected at the other end of the oil seal pressing sleeve; the oil seal pressing screw rod is screwed to penetrate through the bolt hole in the pressing plate, then, is supported by the bearing, and is fixedly connected with one end