The embodiment of the utility model discloses a bamboo ladder placement angle detection device. The device comprises a bamboo ladder, a connecting mechanism and an angle measuring device, the bamboo ladder is connected with the angle measuring device through the connecting mechanism; the connecting mechanism comprises a connecting block and a connecting groove; clamping grooves are symmetrically formed in the upper and lower groove walls of the connecting groove; the connecting block is fixedly connected with the angle measuring device; a push hole is longitudinally formed in the upper surfaceof the connecting block; a sliding hole is transversely formed in the hole wall of the push hole; an upper sliding rod and a lower sliding rod are symmetrically connected in the sliding holes in a sliding mode, a spring is fixedly connected between the two sliding rods, clamping rods are fixedly connected to the left sides of the two sliding rods respectively, the two clamping rods are connectedwith the two clamping grooves respectively in a clamped mode, push rods are fixedly connected to the right sides of the two sliding rods respectively, and the two push rods penetrate out of the connecting block through the push holes respectively. According to the bamboo ladder, the placing accuracy of the bamboo ladder can be effectively improved, the installation and the use are convenient, thestability of the bamboo ladder is improved, and the operation risk is reduced.