The invention provides a lightning arrester mounting base. The lightning arrester mounting base is characterized in that the lightning arrester mounting base comprises an upper installation plug, a lower installation plug, and upper and lower plug sockets for a lightning arrester; when the lightning arrester is installed on the lightning arrester mounting base, the upper installation plug is inserted into the upper plug socket and the lower installation plug is inserted into the lower plug socket; an upper end and a lower end of the lightning arrester are connected respectively to an upper copper bar and a lower copper bar through screws, wherein the upper copper bar is provided with a operating hole; the upper plug socket comprises an upper plug base, a locking spring and a clamping spring; and the lower plug socket comprises a spring compression plate, a spring buckling plate and a socket sleeve and is connected fixedly to an angle iron on the mounting base thereby forming a ground connection, wherein one end of the socket sleeve, one end of the spring compression plate and one end of the spring buckling plate are built up into a stack. An insulating bar is utilized in an assembly process and a disassembly process of the lightning arrester, thus the assembly process and the disassembly process of the lightning arrester have the characteristics of continuous power supply, no need of ascent, low labor intensity, high work efficiency and favorable power supply reliability. The lightning arrester mounting base has the advantages of concise structure, good workability, low cost and vast market prospect.