The utility model discloses a tantalum lining ball valve body, including the valve body base member, valve rod sleeve pipe and sleeve pipe gland, be provided with the sleeve pipe mounting hole on the valve body base member, be provided with valve body tantalum inside lining on the inner wall of valve body base member, be provided with sealed face tantalum lining ring on the sealed face at valve body base member both ends, seal mutually between sealed face tantalum lining ring and the valve body tantalum inside lining, valve rod sleeve pipe and valve body tantalum inside lining fixed connection, the valve rod sleeve pipe sets up in sleeve pipe mounting hole department, sleeve pipe gland and valve body base member fixed connection, valve rod sheathed tube outer end sets up in the sleeve pipe gland, be provided with the interior mounting hole of valve rod on the valve rod sleeve pipe, be provided with the outer mounting hole of valve rod on the sleeve pipe gland, in the valve rod mounting hole with the outer mounting hole of valve rod forms the valve rod mounting hole jointly. The utility model discloses simple structure, novel in design reasonable, the processing preparation is convenient, has not only guaranteed ball valve body's corrosion resistance and reliability, and has guaranteed to have reduced manufacturing cost simultaneously by the bearing capacity of this ball valve greatly, and the practicality is strong, and use value is high.