The present disclosure relates to a coated implantable medical device, comprising: a base layer comprising mTOR inhibitor, and at least one biodegradable polymer； a middle layer comprising mTOR inhibitor, and at least one biodegradable polymer； and a top layer selected from the group consisting of hydrophilic polymer, and combination of hydrophilic polymer and antioxidant, wherein the total mTOR inhibitor concentration over the medical device is in the range of 0.7 to 3.00 μg/mm2. The present disclosure further relates to a method of preparing a coated implantable medical device.
