Current sensor convenient to assemble

The utility model discloses a current sensor convenient to assemble, which comprises an annular main shell, an accommodating groove used for inserting a Hall element is arranged in the annular main shell, an annular magnetic core is arranged in the annular main shell in a clinging manner, the annular magnetic core is provided with notches, the notches are inserted in the two sides of the accommodating groove in a clinging manner, and the Hall element is arranged in the accommodating groove. The outer wall of the annular main shell is provided with a plurality of limiting protrusions used for being connected with the upper cover in a clamped mode, and the upper cover is provided with a plurality of limiting frames used for being connected with the limiting protrusions in a clamped mode. The position of the Hall element is limited through the accommodating groove, and the relative position relation between the Hall element and the magnetic core is fixed, so that the measurement stability of the current sensor i