Disclosed are a protective main board for a battery cell, an electronic terminal and a method for assembling a battery cell of an electronic terminal. The protective main board for a battery cell includes a main board body and a conducting component. The main board body includes a main board circuit and a protection circuit configured to protect the battery cell, and the protection circuit is connected with the main board circuit. The conducting component is arranged on the main board body, and includes a first conducting member and a second conducting member, and the battery cell is electrically connected with the protection circuit through the first conducting member and the second conducting member respectively.