The invention discloses an automatic safety situation sensing, analysis and alarm method for classified resources, and a resource form which comprises the explanation of data, information and knowledge and the concept expression of a data map, an information map and a knowledge map is given. The invention belongs to the crossing field of distributed calculation and software engineering technologies. According to the invention, the method comprises the steps: enabling the network safety situation and an automatic alarm rule to be mapped into a set of data, information and knowledge resource examples, building a resource optimization target function, adjusting the storage and matching scheme through storage and calculation coordination, optimizing the space cost of resource storage and the time efficiency of situation sensing, monitoring the changes of safety situation of a network in real time, and updating the automatic alarm rule set, thereby facilitating the timely response to the safety situation.