The invention relates to the technical field of steam turbines, in particular to a system for recycling control water of a steam turbine and drained water of a gland heater. The system comprises a steam extraction pipeline, a water control steam extraction linkage, a gland heater, a bleeder heater for extracting steam from a high-pressure cylinder, a lower water tank and a condenser, wherein the water control steam extraction linkage, a water control composite valve and the gland heater are communicated with the lower water tank; pressure in the lower water tank is atmospheric pressure; and the gauge pressure of the condenser is 93Ka. By using pressure difference between the atmospheric pressure and pressure in the condenser, the system automatically recycles control backwater and the drained water of the gland heater everywhere and realizes power consumption-free direct recovery of clean condensed water. The device has the advantages of stably controlling the water level, occupying asmall amount of space, avoiding the phenomenon that the control water of the water control steam extraction linkage is drained to pits and the drained water of the gland heater is drained to the condenser to cause air leakage, running stably and reliably, not needing changing according to loads, daily saving clean water about 203.5 tons, and annually saving 222.8 thousand Yuan, namely calculated by a formula of 203.5 tons per day *3 yuan*365 days.