The invention provides a surface tension increasing agent for a hydrocarbon cleaning agent. The surface tension increasing agent is characterized by consisting of or being prepared from the following ingredients in percentage by mass: 80-95% of an organic silicon compound, 0-10% of a stabilizer, 0-10 parts of a dispersant and 0-10% of a penetrant, wherein the ingredients certainty include at least one of the stabilizer, the dispersant and the penetrant. The product provided by the invention is wide in application range, has favorable cleanability, and is capable of effectively preventing secondary pollution of washed-off oil stain. The surface tension increasing agent is also capable of reducing the cleaning agent brought away by workpieces, and reducing losses in a cleaning process.