The utility model provides a plastic fishing string, include: drilling tool, shuttle type drift size gauge tool, fishing tool. The drilling tool is connected to shuttle type drift size gauge tool one end, and fishing tool is connected to the other end, the maximum diameter of shuttle type drift size gauge tool is greater than drilling tool and fishing tool's maximum diameter. The utility model provides a plastic fishing string can once accomplish sleeve pipe drifting, micro deformation tube shaping and the salvage of the oil gas field well well casing post that falls, shortens the well workover cycle, reduces the workover cost.