The utility model discloses a modular fin-inserting radiator convenient to assemble, which relates to the technical field of radiators and comprises a base plate, a radiating plate is inserted into the inner wall of the base plate, a connecting plate is arranged on the outer wall of the base plate, and pull rods are fixedly connected to symmetrical positions of the outer wall of the connecting plate. Through cooperation of the connecting plates, the pull rods and the limiting mechanisms, the effects that a single heat dissipation plate can be disassembled without affecting other heat dissipation plates are achieved, all the heat dissipation plates can be limited through the limiting mechanisms, and when the pull rods are pulled, the connecting plates can be driven to move synchronously, so that the connecting plates drive all the limiting mechanisms to move; in this way, limitation on all the heat dissipation plates can be cancelled, all the heat dissipation plates can be detached, when only one heat dissipation plate needs to be detached, only limitation of the corresponding limiting mechanism needs to be cancelled independently, and in the operation process, other heat dissipation plates cannot be affected.