The invention discloses a temperature-adjustable shell of a current transformer used for a power distribution network low-voltage electric cabinet. The shell comprises a shell body, the shell body comprises a front shell and a rear shell which are movably connected together, and a channel for a bus to pass is formed in the middle of the shell body obtained after splicing. The front shell is provided with a plurality of groups of temperature adjusting holes, temperature adjusting blades are rotationally arranged in the middles of the temperature adjusting holes, and the temperature adjusting blades can open and close the temperature adjusting holes. Cooling holes are formed in the rear shell. Temperature monitoring devices are arranged in the front shell and the rear shell. The temperature adjusting holes are formed in the front shell, the temperature adjusting blades are rotationally arranged at the front end, and the size of the temperature adjusting holes can be adjusted by rotating the temperature adjusting blades, so air enters the shell body and forms convection with the cooling holes in the rear shell together, and temperature in the shell body is adjusted. The temperature monitoring devices are arranged in the shell and used for prompting whether temperature exceeds standards or not, and temperature adjustment is more accurate. The front shell and the rear shell are movably connected, manufacturing is easy, and practicality is high.