Abstract: Electron spin resonance(ESR) technique is a method of paramagnetic analysis for the determination of elements and structure of matters. It can also be used for dating of sediments to solve some problems in sediment age which cannot be solved by other dating techniques. The techniques in measurement of paramagnetic signal and principle for sediment dating are in state of development. Glacial geological processes are complicated and produce a complex glacial sediment with various subtypes. The mechanisms for resetting ESR signal are different from subtypes of the sediments, and the experimental procedures should be chosen properly. Therefore, it is important to identify glacial sedimentary types and collect proper samples for the accuracy of ESR dating. Subglacial meltout till and lodgment till are abraded and crushed in subglacial environment, and they are compacted and contain fine particles in matrix so that ESR signals in some impurity centers in quartz grains are decayed. Superglacial meltout till forms in ice surface environment. It is loose and contains large particles. But some material in superglacial meltout till comes beneath ice and contains concentrated fine particles which sustain subglacial abrasion to decay ESR signal, and exposes to sunlight during deposition to further decay the signal. ESR signal in some quartz grains can completed bleached. Fine sand and silt in glacial lake deposit and glacial meltwater sediment are the producta of subglacial comminution/abrasion. ESR signal in quartz grains would be decayed during transportation, and would be further decayed during sedimentation. The mechanism for ESR signal resetting is not clear for other types of glacial sediments and some grains in sediments are too large for measurement of ESR signal. They are not suitable for ESR dating. It is strongly suggested to collect contemporary glacial sediments with the same sedimentary processes with the samples for geological dating so as to reduce possible residual signal for more accurate results.