The invention relates to the technical field of geographic mapping, and discloses a high-stability photographing device for geographic mapping. The photographing device comprises a main rod; and the top of the main rod is fixedly connected with a top frame. Through the combined action of the top frame, a clamping block, a movable rod, a rotating column and a rotating disc, a camera is controlled to be in a fixed state by rotating a rotating button, so that the situation that the camera deviates or even falls off due to improper use is avoided, the stability of the camera is improved, the geographic mapping operation is facilitated, the operation is convenient, and the camera is convenient to take. Through the combined action of a pressing ring, an arc rod, a frame rod, an eccentric disc, asleeve, a branch pipe and a support rod, diffusivity is automatically performed to carry out triangular supporting so as to improve the stability of a support; the support length is automatically adjusted according to the flatness degree of the ground, so that the camera is kept in a horizontal state, and the photographing operation is facilitated; and compared with a traditional support mode, the operation is more convenient, and the automation degree is higher.