To avoid the use of organic solvents and improve the problem of self-generated proppants easy to aggregate during growth in the well，an environmentally friendly self-generated proppant was designed using styrene（St）and divinylbenzene （DVB）as phase change component，and aqueous solution containing dispersants as non-phase change one. By adjusting the composition and dosage of dispersants in non-phase change component and the speed of pre-mixing of the two phases，the optimum formula and preparation process of self-generated proppant were determined. The morphology and structure of self-generated proppant were analyzed by scanning electron microscope，X-ray diffraction analysis and infrared spectroscopy. Furthermore，its performances were evaluated by particle strength tester and constant load tester. The results showed that，the pre-mixing speed of the two phases was determined to 120 r/min. The dispersants in non-phase change component was polyvinyl alcohol-1788， methylcellulose and sodium dodecyl benzene sulfonate in mass ratio of 5000∶175∶2. When the reaction was standing at a simulation fractures temperature of 100 ℃，the liquid-solid phase transition time of self-generated proppant was 32.5—40.0 min，and then the rapid increase in strength was achieved about 24 min after the phase transformation. The yield of single particle dispersed proppant could reach 78%. Meanwhile，the size of 60% proppant particles could be controlled in 0.850—0.425 mm（20—40 mesh）. The self-generated proppant particles had maximum single particle strength about 32 N，an apparent density of about 1.18 g/cm³，a degree of sphericity of about 0.9 and a low acid solubility of 2.47%. The single particle strength of self-generated proppant was comparable to that of commercially available ceramic proppant，while significantly higher than that of quartz sand proppant. Its acid resistance was significantly higher than that of both. The proposed self-generated proppant and its construction method improved the problems of easy aggregation，low yield and low microsphere formation yield of the self-generated proppant under the absence of shear force. Furthermore，the phase-change solution here did not need to add any organic solvents and is environmentally friendly. It had great potential for deep reservoir exploitation.