A digital resin sand regeneration system comprises a vibrating knockout device, a magnetic separation device, a vibrating crushing device, an intermittent grinding regeneration unit, a conveying device, a sand storehouse, a dedusting device, a computer control system, etc. The main working principle is as follows: waste sand blocks are vibrated and crushed into smaller blocks and scattered sand by the knockout device; magnetic separation is performed to remove iron beans and flash; crushing is performed by the crushing device to obtain granular scattered sand; stripping, grading and temperature adjustment are performed by the intermittent grinding regeneration unit to remove micro powder included in the sand, and the sand temperature is adjusted to a temperature required by the process; and the sand is conveyed to the sand storehouse to keep in reserve. Through the additionally installed computer control system which comprises a material level sensor, a temperature sensor, a pressure sensor, and a corresponding electric control component, the whole production line can realize the target control of technological parameters and stock sand amounts; mainly-controlled technological parameters are: stripping rate (loss on ignition, LOI), micro powder content, sand temperature and sand amount; and technical guarantee is provided for the digital production management of the whole factory. Digital control of molding resin amount, hardening stripping time, and sand using amount is basic guarantee for solving energy saving and consumption reduction, improving productivity, and increasing yield.