The invention relates to an environment-friendly electric cable well protective cover which is suitable for occasions such as drainage, pollution discharge, municipal engineering, networks, telecommunication, cables, and gas pipelines. According to the structure of the environment-friendly electric cable well protective cover, the shape of a cover body is matched with that of a well lid, and a buckling structure is arranged on the periphery of the cover body. According to the environment-friendly electric cable well protective cover, the well lid and a well chamber are tightly combined, so that noise which is generated when a vehicle presses the protective cover is lower and the life quality of residents is improved. In addition, the protective cover wraps the well lid, so that the anti-theft effect is good. Through a caution structure that the protective cover can emit light at night, the protective cover has the remarkable caution effect and the safety performance is improved. Meanwhile, the environment-friendly electric cable well protective cover is convenient to install, free of adjustment, simple in structure, low in cost, reliable in performance, convenient to operate, strong in practicability and suitable for popularization and application.