Abstract: In this paper, the expression of the microgravity at arbitrary point in a near-earth satellite was presented.The levels of microgravity of the first test of space material processing in the chinese recoverable satellite were analysed and approximately estimated.It is showed that the level of microgravity is less than 1×10~(-5)g_0 which varies quasisteadily with the period of orbit and is added by the random acceleration with amplitude less than 2×10~(-4)g_0.

Key words: Weightless environment, Approximate calculation