The invention discloses a fault isolation intelligent controller convenient and fast to install. The fault isolation intelligent controller comprises a controller body. A mounting groove is formed inthe back surface of the controller body. The top and the bottom of the inner wall of the mounting groove are fixedly connected with sliding rails. Each sliding rail is internally and slidably connected with two sliding blocks. The opposite sides of the two sliding blocks are movably connected through a telescopic rod. The telescopic rod is connected with an extruding spring in a sleeved mode. Thetwo ends of the extruding spring are correspondingly and fixedly connected with the opposite sides of the two sliding blocks. The four sliding blocks are divided into two sets, the number of each setof sliding blocks is two, and the opposite sides of each set of sliding blocks are connected through an extruding plate. Through improvement of the extruding plates, when two pulling plates are pulledbackwards, the two sets of sliding blocks can drive the two extruding plates to be separated, after loosening the pulling plates, under the function of spring extruding rebound force, the two sets ofsliding blocks can drive the extruding plates to be clamped and connected to a fault isolation device, and after loosening the pulling plates, under the function of return spring rebound force, the two extruding plates can be clamped and connected to the fault isolation device again.