Abstract: This Study were carried out for 6 years and detail descriPtion of the objects，method，demarcation of phenological stages，site conditions and relalion beween phenological phenomenon and lac production are：also givten here．It has been seen from the data that the phenological Stages of the Same plant may be very different in different years For example, in the years eith higher temprature and rich rainfall the nutritional growth stages of the four host Plants would begin earlier and extand longer with the exception of Dalbergia szemaoensis in the latter aspect．While in those With higher temprature but less rainfall the seed-fall stage would make their appearances earlier，and the seeding stages of the four species of host plants cut short period．The pods of Dalbergia obtusifolia，when fully ripened，start to fall and last only two weeks to its final falling．This shows the importance of seizing the due time to collect seeds．