The invention discloses a multi-sample parallel experiment clamp capable of providing continuous clamping force. The multi-sample parallel experiment clamp is used for clamping multiple parallel samples on a material testing machine. The clamp is provided with an upper adapting positioning flange (1) and a lower adapting positioning flange (9), and the upper adapting positioning flange (1) and the lower adapting positioning flange (9) are vertically symmetrical. Positioning channels shaped like a Chinese character 'mi' are formed in each flange and are formed by three sliding grooves which pass through the circle center of the flange; four positioning frames are arranged on every two positioning channels which are perpendicular to each other respectively, and a positioning frame is arranged on the remaining positioning channel in the corresponding flange and passes through the circle center of the flange. The positioning frames are connected with the positioning flanges through bolts. Each positioning frame is of a U-shaped structure, and a pair of clamping blocks which is controlled to open and close through a special screw rod is arranged in each positioning frame. Through the structure of the clamp, the multiple parallel samples can be arranged on the material testing machine when the clamp is used, and the clamp has the advantages of being high in efficiency, continuous in clamping force, capable of preventing the samples from sliding off, easy to operate, economical and practical.