A sliding plate hinge of a portable electronic device terminal includes a fixed plate and a sliding plate. A sliding-guide groove for the sliding plate is disposed at either side of the fixed plate. A frictional component supported by an elastic component is also disposed at either side of the fixed plate respectively. The frictional components at the two sides form a compression fit with the side surface of the sliding plate or with the side surface of a component fixedly connected to the sliding plate, so as to generate side pressure against the sliding plate or the component fixedly connected to the sliding plate. The design utilizes the frictional components to generate side pressure against the sliding plate or the component fixedly connected to the sliding plate and thus generate frictional damping, ensuring that the sliding plate hinge has a comfortable hand-feel even in the absence of a drive spring.