Remediation and improvement device for heavy metal contaminated soil and use method of remediation and improvement device

The invention relates to a soil remediation and improvement technology, aims at solving the problems that when an existing soil remediation device is used, soil needs to be collected into a container for improvement and remediation, the working procedure is complex, and the soil remediation efficiency is low, and particularly relates to a remediation and improvement device for heavy metal contaminated soil and a using method thereof. According to the device, firstly, soil is crushed, so that the follow-up soil mixing and stirring function can be smoothly achieved, the soil is stirred through a rotating disc and a cutting block, part of the soil passes through a hole below the cutting block, it is guaranteed that an agent can be fully mixed and stirred after being released into the soil, and therefore the soil can be well mixed and stirred; the spraying range of the pesticide is improved, the curing coverage rate of the pesticide is increased, lifting of a first connecting rod and a second connecting rod is co