The invention provides a plug type sand control method for a slim hole sidetracked well. The method includes the following steps that S1, a production string is pulled out; S2, a sand washing string is placed in; S3, after the sand washing string is placed at a sand surface position, sand washing is conducted; S4, a sand control string is completed; S5, a pressure test is conducted on a surface pipeline; S6, a shaft is filled; S7, prepad fluid is used; S8, plug type gravel filling is conducted on the shaft; S9, displacement fluid is used; S10, waiting on cement setting is conducted; S11, plug drilling and plug reserving are conducted. A sand blocking column plug is formed in the shaft of a sand control target stratum through consolidation chemical sand control proppants in a low pumping pressure filling mode, formation sand is effectively blocked outside the shaft and prevented from entering the shaft; due to the fact that the permeability of the sand blocking column plug is about 2 micron<2>, formation fluid passing is not affected, the purposes of sand control and production maintenance are achieved, the problems that the construction risk of conventional high pumping pressure gravel filling is high, the quantity of low pumping pressure gravel filling is small, a continuous sand blocking barrier is difficult to form, and the sand control effect is not ideal are solved, the one-time success rate of the method applied to sand control of the slim hole sidetracked well is one hundred percent, and the time of single well continuous production exceeds 500 days.