In order to disscus the influencing factors of compressive strength of plastic concrete,the reasonable testing method of compressive strength of plastic concrete was given and series comparative tests have been accomplished aiming at raw materials and maintenance condition of plastic concrete.According to analysing the influencing factors of compressive strength of plastic concrete in detail,the influencing rule of each factor to the compressive strength of plastic concrete was drawn.The results indicate that less dosage of water,clay,bentonite and larger dosage of cement,and mixing coal ash and admixture can increase compressive strength of plastic concrete.