The invention discloses an ERP sale customer service assurance system. The defects are overcome that currently, because it is difficult for salesmen in an enterprise to conduct information communication among customers in real time when the salesmen carry out customer mining and follow up customer information, the customer information is easily crossed, labor is wasted and customer cooperation isnot convenient. According to the technical scheme, the ERP sale customer service assurance system includes a log-in module, a global database, salesman databases and a public database, wherein the log-in module is used for logging in and obtaining usage authorities according to different pieces of sole identification information, the global database is used for storing the customer information, the salesman databases are used for storing the information of a corresponding customer for whom each salesman is responsible, and the public database is used for storing the customer information; the ERP sale customer service assurance system further includes a transfer module and a processing module, wherein the transfer module is used for outputting transfer commands, and the processing module responds to the transfer commands so as to transfer the customer information selected from the public database to the corresponding salesman database for storage, and delete the transferred customer information from the public database. The ERP sale customer service assurance system can conduct one-to-one following up and handling on the customer information, and multi-person following up is avoided.