Tibia insert used in rotary hinge knee joint revision

The utility model relates to a tibia insert used in rotary hinge knee joint revision. The tibia insert comprises a fastener and a tibia platform pad made of a high-crosslinking ultra-high molecular weight polyethylene material, wherein a positioning hole for inserting the fastener is formed in the tibia platform pad; the tibial plateau pad is provided with a first end and a second end which are opposite; two grooves are formed in the top face of the tibial plateau pad and located in the two sides of the positioning hole respectively, smooth curved surfaces are formed in the top face areas in the grooves, and the height of the second end is larger than that of the first end; the height of the inner side area of the groove is larger than that of the outer side area of the groove, so that when the femoral condyle rotates relative to the tibial plateau pad, the inward rotation angle and the outward rotation angle can reach 30 +/-1 degrees respectively. Therefore, the problems that in the prior art, a platform pad