The invention relates to a terminal box door handle, in particular to a looseness-preventing type terminal box door handle. The looseness-preventing type terminal box door handle comprises a fixed clamp seat fixed on a box cover and a rotary handle located in the position of a center hole of the fixed clamp seat, wherein a handle head is formed at the front end of the rotary handle, and a bolt is arranged at the rear end of the rotary handle. The looseness-preventing type terminal box door handle is characterized in that the rotary handle can axially move in the center hole of the fixed clamp seat, a spring I is arranged between the handle head and the fixed clamp seat, and a spring II is arranged between the bolt and the fixed clamp seat. According to the looseness-preventing type terminal box door handle, the problem that a common terminal box door handle is easy to loosen is solved, electrical apparatus elements in a terminal box can be prevented from accelerated damage caused by external environment influence, and the looseness-preventing type terminal box door handle can be widely applied to the terminal boxes of equipment such as a mutual inductor, an isolation switch, a switch and the like in a transformer substation.