Informatization of family farms is an important aspect of the agricultural informatization process.Starting from the application of informatization literacy and information technology，this paper constructs an evaluation index system for the informatization level of family farm，and empirically measures and analyzes the informatization level and influencing factors of 1199 family farms in China by using the entropy value method.The results show that the current average informatization level of family farms in China is 0.260，which is at a moderately low level；the informatization of family farms is mainly supported by informatization literacy，and the contribution of information technology application is significantly insufficient.Moreover，there is heterogeneity in informatization development among family farms based on business types and demonstration levels，with non-grain planting family farms and provincial demonstration family farms exhibiting higher informatization levels.In addition，factors influencing the informatization level of family farms include the education level of the farmer，years of farming，operation scale，adoption of new technologies，production standards，financial standards，agricultural products testing，and trademark registration.Therefore，the government should strengthen support for family farms informatization，attach importance to agricultural education for family farm operators，and improve the agricultural socialized information service system.