The invention relates to scissor grip type pliers with replaceable heads. The scissor grip type pliers comprise a left handle, a right handle, the left plier head and the right plier head. The left handle and the right handle are connected in a hinged manner. A left scissor grip is arranged at the rear end of the left handle. A right scissor grip is arranged at the rear end of the right handle. The left plier head and the right plier head are in threaded connection with the left handle and the right handle respectively. The scissor grip type pliers have the beneficial effects that the handles are provided with the scissor grips, when a jaw needs to be opened, opening with two hands is not needed, single-handle operation can be achieved, and the scissor grip type pliers are simple and feasible; and the plier heads and the handles are in threaded connection, the plier heads are replaced, and the functions of the pliers are increased. The situation that the whole pliers need to be replaced when the plier heads are damaged is avoided, and waste is reduced; the handles and the scissor grips are wrapped with anti-skidding sleeves, the pliers are prevented from sliding down during using, safety and reliability are achieved, and work is convenient.