The invention discloses a salt-based automatic database performance monitoring system. The system is characterized by monitoring database performance through acquiring cpu data corresponding to a database service process; the system comprises a salt management end, database nodes and a zabbix server; the salt management end is used for acquiring cpu information of database service processes on the database nodes through salt clients, and sending the cpu information to the zabbix server; the database nodes are servers for deploying database services; one salt client is deployed on each database node; the database nodes are used for calling acquisition scripts on the nodes according to parameters transmitted from the salt management end so as to acquire performance monitoring data; and the zabbix sever is used for receiving monitoring data, carrying out warning according to a warning strategy and displaying a tendency chart of the monitoring data. The system disclosed by the invention is capable of realizing the automatic monitoring of database performance, and is basically free of labor cost, strong in universality and convenient to user.