In this study, the three main objectives of this study were to 1) to know the production efficiency of big rice fields and small rice fields, 2) to know the cost and the return of the slow rice cultivation, and 3) to know the differences in production efficiency, and cost compensation of big rice fields and small rice fields by using “ Data Envelopment Analysis” model to analyze production efficiency with 1 variable of production factor and 8 variables of production factors, divide the efficiency level into 5 levels ( the least – the most) and use “ Budget Analysis” to analyze the cost and production return of farmers in order to find value in production. From this study, we found that most of the farmers have education levels during primary education, they have tractors and pumps as main agricultural property, have their own planting area by using water from the mine and irrigation water for cultivation, and we found that big rice fields of farmers have slightly higher than small rice fields ( 0.9213> 0.9065) , and most of production efficiency has the highest level of efficiency, but by the way rice cultivation in both groups should reduce 2-3 factors, especially the amount of labor for production and agricultural investment while the overall economy of scale is in the decreasing phase of the scale effect. For the analysis of costs and returns, we found that the big rice field of farmers receives the highest average return of 4,382. 41 Baht per Rai, which is higher than the small rice field of farmers with the average net return of 4,105.51 Baht per Rai, due to from higher productivity while the production cost is not much different, except the big rice field of farmers who have a low level of production efficiency, have production costs higher than the rice production cost of sub-rice farmers by 4.8 times, causing this group of large rice farmers to lose when reducing the input slack, the average net return of the rice growers of the big field rice is 4,904.33 Baht per Rai while the small field rice have the highest return of 5,123. 00, and by reducing the excess production factors, the big field rice of farmers with low efficiency levels, which had previously suffered a loss, net return increases and the loss of the use of the means of production by the actual farmers.