Abstract: The research progress in space dust (micro-sized orbit debris and micrometeoroids) detection techinology is reviewed. The operational principle, the technique feature and tlle engineering application of representative in-situ space dust impact detectors such as me piezoelectric dust impact detector, the metal-oxide-silicon dust impact detector, the impact-ionization dust detector, and the combined dust impact detector are discussed. The novel space dust detection technoIogy around the wodd as well as in China are outlined.