The aim of the test is to research the influence rules of TEA·HCl on the workability of cement paste and concrete.Based on the features of the new hardening accelerator, we established experimental analysis system through different dosages of hardening accelerator, and verified the feasibility of such accelerator to satisfy the need of practical engineering.The results show that adding of the hardening accelerator can accelerate the cement hydration, and what is more,when the dosage was 0.04%, the setting time was the shortest while the initial setting time and final setting time were 130min and 180min, respectively.The initial fluidity of cement paste of adding accelerator was roughly equivalent compared with that of blank.After 30min, fluidity loss would be decreased with the dosage increasing, but fluidity may be increased.The application of the hardening accelerator can make the early workability of concrete to be improved, especially the slump loss of 30min can be improved more significantly.The bleeding rate of concrete was significantly decreased after adding TEA·HC1.The conclusion is that the new hardening accelerator can meet the need of the workability of cement-based materials in the optimum dosage range.