The invention discloses a feature vector generation method and device and a text classification method and device based on feature vector, and relates to the technical field of computers. A specific embodiment of the feature vector generation method comprises the steps of obtaining a feature weight matrix and a word vector matrix of text data, wherein the feature weight matrix is composed of an association weight of the text data and a business scene category; generating a feature vector matrix by operating a feature weight matrix and a word vector matrix, and the feature vector matrix being composed of feature vectors. According to the method, all characteristics of the text data can be combined, text classification based on service scenes is achieved, text classification precision basedon different service scenes is improved, and user experience is improved for different service scenes.