  Compact torus injection is considered as a high promising approach to realize
central fueling in the future tokamak device. Recently, a compact torus
injection system has been developed for the Experimental Advanced
Superconducting Tokamak, and the preliminary results have been carried out. In
the typical discharges of the early stage, the velocity, electron density and
particles number of the CT can reach 56.0 km/s, 8.73*10^20 m^(-3) and 2.4*10^18
(for helium), respectively. A continuous increase in CT density during
acceleration was observed in the experiment, which may be due to the plasma
ionized in the formation region may carry part of the neutral gas into the
acceleration region, and these neutral gases will be ionized again. In
addition, a significant plasma rotation is observed during the formation
process which is introduced by the E*B drift. In this paper, we present the
detailed system setup and the preliminary platform test results, hoping to
provide some basis for the exploration of the CT technique medium-sized
superconducting tokamak device in the future
