Pipe repair device

The invention relates to a pipe repair device comprising a plurality of continuously distributed short pipes and a traction mechanism for pulling the short pipes to move. Every two adjacent short pipes are connected through at least two positioning assemblies. Each positioning assembly comprises a positioning block fixed to the side face of the corresponding short pipe and a fastener connected tothe end of the positioning block. Positioning grooves are formed in the end faces, away from the positioning blocks, of the short pipes, and the number of the positioning grooves is the same as that of the positioning assemblies. The positioning block of one short pipe is inserted into the positioning groove of the other short pipe and then is positioned through the corresponding fastener. Soft bushing rings with surfaces soaked with liquid thermo-setting resin are connected between every two adjacent short pipes. The middles of the positioning blocks are provided with penetrating holes extending in the length directi