The invention provides an intelligent well top part packer, comprising an upper joint, a center pipe, a slip cover, a pressure spring, a slip, a cone, an adjusting ring, a rubber drum, a piston, a suspending ring, a pressure separation sleeve, a limiting ring, a deblocking dowel, a limiting sleeve, a locking sleeve, a locking ring, a spring, a pressing cap and a lower joint, wherein the upper part of the center pipe is connected with the upper joint; the lower part of the center pipe is connected with the lower joint; the slip cover, the pressure spring, the slip, the cone, the adjusting ring, the rubber drum, the piston, the locking sleeve and the pressing cap are connected and installed outside the center pipe in sequence; the pressure separation sleeve, the limiting sleeve, the lock ring and the spring are installed under the piston and in the pressing cap; the suspending ring is installed under the piston and on the pressure separation sleeve; the limiting ring is installed under the pressure separation sleeve and on the limiting sleeve; the locking ring and the spring are installed outside the limiting sleeve, in the locking sleeve and on the pressing cap; vertical pipe cable passing holes are formed in the wall of the center pipe. The intelligent well top part packer has the functions of radial self-locking by six equally-divided petals of the locking ring, great self-locking force, large internal passing diameter, high seal intensity, oil layer protection and the like, thereby being widely applied in intelligent well completion tools for oil exploitation.