The utility model discloses a wankel engine's radial seal and lubricating arrangement comprises side shell, oil pan, oil cleaner, metering type oil pump, quick -witted oil spraying hole, quick -witted oil spraying mouth, axial machine oil room, radial seal strip, radial spring, angle seal strip and top seal groove at least, the radial seal strip is at least including hollow sealed piece, the spout on top and the roller in the spout, when the rotor rotates, the radial seal strip the elasticity of centrifugal force, radial spring and gas pressure's combined action down by crowded to air cylinder molded surface, realize that the partition between the cavity is sealed, simultaneously the metering type oil pump with machine oil from starting the quick -witted oil spraying hole on the machine side shell to spout intos axial machine oil room, machine oil in the axial machine oil room gets into the spout on radial seal strip top along the pore of radial seal strip bottom under the effect of centrifugal force in, along with the roll of roller in the spout, machine oil flow out from the spout continually sprawl the roller and with the air cylinder molded surface of roller contact on, the continuous even lubricating oil film of formation.