The middle buried grouting water stop is a new improvement on the basis of the traditional rubber water stop. The water stop can make use of the rubber's high elasticity and compression deformation characteristics to produce elastic deformation under various loads, so as to effectively tighten and seal, prevent water leakage, water seepage and shock absorption and buffer effect of building structure, so as to improve the waterproof of construction / expansion joint Safety factor. If leakage occurs, Yu'an waterstop can be repaired effectively and quickly with waterproof quality, reliable and no recurrence. Its comprehensive cost is the most economical, and the weakness of traditional waterstop is completely solved. It adopts advanced waterproof concept and is widely used in the construction of construction joints, deformation joints and bridge expansion joints. It has the characteristics of detection and grouting repair;