The utility model discloses a novel junction box. The device comprises a bottom box, the top ends of the front side plate and the rear side plate of the bottom box are inclined inwards to form neckingshapes; wherein the front side plate and the rear side plate of the bottom box are provided with stretching-in openings for hands to stretch in, the left side plate and the right side plate of the bottom box are provided with threading holes for threading, the top of the bottom box is detachably provided with a cover plate, the cover plate is composed of a top cover plate, a front side cover plate and a rear side cover plate, and the stretching-in openings in the front and rear sides of the bottom box are covered; clamping blocks capable of stretching and retracting horizontally are arrangedat the positions, close to the bottom, of a front side plate and a rear side plate of the bottom box respectively, clamping grooves are formed in the corresponding positions of the front side cover plate and the rear side cover plate of the cover plate respectively, and the two clamping blocks are matched with the corresponding clamping grooves respectively, so that the cover plate and the bottombox are fixed. Compared with the prior art, the junction box has the advantages that a hand can conveniently extend into the junction box to perform wiring operation, and the cover plate is very convenient and fast to mount and dismount.