The invention relates to a practical training system, in particular to a law teaching practical training system. When law teaching practical training is not carried out, a sliding connecting frame slides into a supporting frame, the supporting frame slides into the sliding connecting frame and the supporting frame, supporting legs rotate to achieve folding and folding, a side turning plate rotatesaround the supporting frame to achieve the purpose of folding the side turning plate, and at the moment, the occupied area of the law teaching practical training device is minimum. When law practicaltraining is prepared, the supporting frame slides out of the sliding connecting frame and the supporting frame, the sliding connecting frame slides out of the supporting frame, the side turning platerotates around the supporting frame to a horizontal state, the supporting legs rotate in a vertical state, and the lower ends of the supporting legs touch the ground, the detachable plate is detached, a clerk seat during practical training is placed in the original large through groove of the detachable plate, and a judge, a clerk, an original notice and a notified party are spaced by a certain distance during teaching practical training, so that the field feeling and the intuitive feeling of practical training students are effectively improved, and the students are effectively stimulated tosearch related laws and regulations and related judicial instances in a targeted manner.