The objectives of this Mixed Method Research. The Qualitative Research and quantitative research has three main objectives are : 1) to study the Sangha’s role and Buddhism propagation in Donthoom District, Nakhonpathom Province. 2) to study the relationship between personal factors the Sangha’s role and Buddhism propagation in Donthoom District, Nakhonpathom Province and 3) to study the problems and suggestions of the Sangha’s role and Buddhism propagation in Donthoom District, Nakhonpathom Province. Conducted with a group of clergy in Donthoom district, 267 is obtained by a simple random sampling method. Data collection tools included an interview. Form field and questionnaire. Analysis of data from the questionnaires were analyzed by using SPSS percent for the general information of the respondents mean and standard deviation for the comment and using the chi-square () test for relationships between variables by statistical significance level of 0.05.

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The research results :

              1. role of Buddhist side revelation monk flat the Buddhism in Donthoom District, Nakhonpathom Province meet that ; the Buddhist monk has work side Education training, by the overall image is in many level (µ = 3.72), and when separate be lay meet that every have the practice is in many level.

              2. The relationship between personal factors the Sangha’s role and Buddhism propagation in Donthoom District, Nakhonpathom Province found that age, year, educational religious student background, educational ordinary background and educational background relationship which accept hypothesis all set.             

              3. The interview. Monks dedicated to religion is also small compared to the population. Clergy to a Buddhist missionaries to the lack of knowledge and experience to solve the problem of propagation of a particular skill moves in the propagation of Buddhism, who served a few missionaries. The propagation model used in the absence of evolution to keep pace with the progress of society. Lack of support from other government agencies. Related to the propagation of religion. Priests do the same.

              4. Suggestion in the revelation flat the Buddhism in the Donthoom District, Nakhonpathom Province Education training. Should increase training for monks and Buddhism and more. So that the priest can celebrate properly. Foundation should be established to prepare for the mission specifically. Personnel should provide more propaganda. The missionaries began to team together in groups, share and learn each other. Should have training in Arizona during a meeting with a probation officer is required to attend strictly to the clergy should be given a chance to preach the new version. Have the opportunity to practice and preach on several occasions. There should be a forum for the priests had a chance to preach it. Propagation model should be developed to date to avoid boredom. There should be provision of adequate resources for the mission. And religious activities. There should be more support for Buddhism. And to spread the culture and lifestyle intervention in rural areas with