Legislative assessment is related to the quality of legislation and the scientific nature，democracy and appropriateness of the legislative process itself. The construction of a legislative assessment mechanism is therefore important for the legislation itself，especially in local legislation. In the process of establishing a legislative evaluation mechanism，we should uphold the principles of party leadership，science，evaluation of the correct value，systematic objective，and dynamic assessment. In the practice of legislation，Guangdong is forming a more systematic and scientific approach. The experience is of great significance to establish a complete local legislative evaluation mechanism.