The utility model discloses a main material connection-disconnection node used for the section of power transmission tower four-combination angle steel without a filler plate. The main material connection-disconnection node comprises four main materials and outer covering angle steel. Two opposite corners of the four main materials are connected and disconnected in a staggered mode. The outer covering angle steel is utilized by the connected and disconnected opposite corners. The outer covering angle steel is arranged on the inner sides of two main materials of the connected and disconnected opposite corners. Every two main materials are in direction contact with each other. The filler plate used for the connection of the regular four-combination angle steel is eliminated, bolts are directly used to connect four legs, inner flitch plates are flexibly eliminated under the condition that the component strength and the rigidity are guaranteed at the connection-disconnection points of the main materials, the outer covering angle steel mode is directly utilized to perform connection, and the node weight is effectively reduced by approximate 10%. The four-combination angle steel is under great stress, the processing mode of staggered sections and pairwise corner connection and disconnection is directly used by the connection-disconnection points, the adverse impact of mutation of the rigidity of the connection-disconnection notes is effectively avoided, and the safety of the nodes is improved. The filler plates of the regular four-combination corner steel is eliminated, so that the weight of the whole tower is effectively reduced, the welding work is reduced, and the main material connection-disconnection node is convenient to process, convenient to construct and has obvious advantages.