A rainproof writing board for transformer substation operation and maintenance comprises a first panel, a recording pen fixing clamp and a work ticket fixing clamp are arranged on the first panel, a fence is arranged in the circumferential direction of the first panel, and the rainproof board and the fence are fixed in a magnetic attraction mode. The recording pen fixing clamp comprises a fixed clamping piece and a movable clamping piece, wherein the movable clamping piece is connected with the fixed clamping piece through a spring telescopic rod. The work ticket fixing clamp comprises a lowerclamping piece and an upper elastic clamping rod, and the lower clamping piece is fixedly connected with the upper elastic clamping rod. The rainproof writing board for operation and maintenance of the transformer substation can improve the working efficiency.