The invention discloses a portable product bearing. An open hole is formed on a body; the bottom of the body is convexly provided with a limit block so as to form a slide way; the opposite side of theslide way is provided with a straight guide slot; the inside of a slot is convexly provided with a connector, and the periphery of the slot is provided with through holes; a slide block of an exit device is arranged in the slide way; the slide block is provided with an inclined guide slot; a key is inserted into the open hole and leans on an inclined plane of the slide block; a top block is convexly provided with a slide pin; one end of the slide pin is embedded into the inclined guide slot, while the other end is embedded into the straight guide slot; the upper end of the top block is provided with a top rod inserted into the through holes; one end of a spring butts against the body, while the other end is fixed to one end of the slide block so as to enable the slide block to lean against one end of the inclined plane; and the sliding pin is positioned at the bottom end of the inclined guide slot by jacking the key.